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Finding the Fourth Proportional to 458,528.30, 687,792.45 and 427,424.30

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Solution

The fourth proportional to 458,528.30, 687,792.45 and 427,424.30 is: 641,136.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,528.30 : 687,792.45 = 427,424.30 : x
  2. Step 2: Convert to fraction form
    458,528.30/687,792.45 = 427,424.30/x
  3. Step 3: Cross multiply
    458,528.30x = 687,792.45 × 427,424.30
  4. Step 4: Simplify right side
    458,528.30x = 293,979,206,486.54
  5. Step 5: Solve for x
    x = 293,979,206,486.54/458,528.30
  6. Step 6: Final answer
    x = 641,136.45

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Similar ratio
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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.