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Finding the Fourth Proportional to 639,228.80, 957,968.40 and 425,388.80

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Solution

The fourth proportional to 639,228.80, 957,968.40 and 425,388.80 is: 637,501.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,228.80 : 957,968.40 = 425,388.80 : x
  2. Step 2: Convert to fraction form
    639,228.80/957,968.40 = 425,388.80/x
  3. Step 3: Cross multiply
    639,228.80x = 957,968.40 × 425,388.80
  4. Step 4: Simplify right side
    639,228.80x = 407,509,028,113.92
  5. Step 5: Solve for x
    x = 407,509,028,113.92/639,228.80
  6. Step 6: Final answer
    x = 637,501.05

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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.