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Finding the Fourth Proportional to 425,943.68, 638,915.51 and 399,962.12

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Solution

The fourth proportional to 425,943.68, 638,915.51 and 399,962.12 is: 599,943.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,943.68 : 638,915.51 = 399,962.12 : x
  2. Step 2: Convert to fraction form
    425,943.68/638,915.51 = 399,962.12/x
  3. Step 3: Cross multiply
    425,943.68x = 638,915.51 × 399,962.12
  4. Step 4: Simplify right side
    425,943.68x = 255,541,999,685.81
  5. Step 5: Solve for x
    x = 255,541,999,685.81/425,943.68
  6. Step 6: Final answer
    x = 599,943.17

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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.