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Finding the Fourth Proportional to 640,014.60, 960,021.90 and 608,910.60

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Solution

The fourth proportional to 640,014.60, 960,021.90 and 608,910.60 is: 913,365.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,014.60 : 960,021.90 = 608,910.60 : x
  2. Step 2: Convert to fraction form
    640,014.60/960,021.90 = 608,910.60/x
  3. Step 3: Cross multiply
    640,014.60x = 960,021.90 × 608,910.60
  4. Step 4: Simplify right side
    640,014.60x = 584,567,511,142.14
  5. Step 5: Solve for x
    x = 584,567,511,142.14/640,014.60
  6. Step 6: Final answer
    x = 913,365.90

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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.