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Finding the Fourth Proportional to 642,269.40, 963,404.10 and 404,842.20

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Solution

The fourth proportional to 642,269.40, 963,404.10 and 404,842.20 is: 607,263.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,269.40 : 963,404.10 = 404,842.20 : x
  2. Step 2: Convert to fraction form
    642,269.40/963,404.10 = 404,842.20/x
  3. Step 3: Cross multiply
    642,269.40x = 963,404.10 × 404,842.20
  4. Step 4: Simplify right side
    642,269.40x = 390,026,635,333.02
  5. Step 5: Solve for x
    x = 390,026,635,333.02/642,269.40
  6. Step 6: Final answer
    x = 607,263.30

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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.