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Finding the Fourth Proportional to 643,968,661.60, 965,952,992.40 and 482,725,525.60

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Solution

The fourth proportional to 643,968,661.60, 965,952,992.40 and 482,725,525.60 is: 724,088,288.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,968,661.60 : 965,952,992.40 = 482,725,525.60 : x
  2. Step 2: Convert to fraction form
    643,968,661.60/965,952,992.40 = 482,725,525.60/x
  3. Step 3: Cross multiply
    643,968,661.60x = 965,952,992.40 × 482,725,525.60
  4. Step 4: Simplify right side
    643,968,661.60x = 466,290,165,961,182,848
  5. Step 5: Solve for x
    x = 466,290,165,961,182,848/643,968,661.60
  6. Step 6: Final answer
    x = 724,088,288.40

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Double scale
Find fourth proportional to 643,968,662.60, 965,952,993.90 and 482,725,526.60
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.