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Finding the Fourth Proportional to 985,608.30, 1,478,412.45 and 424,642.80

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Solution

The fourth proportional to 985,608.30, 1,478,412.45 and 424,642.80 is: 636,964.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,608.30 : 1,478,412.45 = 424,642.80 : x
  2. Step 2: Convert to fraction form
    985,608.30/1,478,412.45 = 424,642.80/x
  3. Step 3: Cross multiply
    985,608.30x = 1,478,412.45 × 424,642.80
  4. Step 4: Simplify right side
    985,608.30x = 627,797,202,322.86
  5. Step 5: Solve for x
    x = 627,797,202,322.86/985,608.30
  6. Step 6: Final answer
    x = 636,964.20

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Double scale
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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.