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Finding the Fourth Proportional to 425,935.52, 638,962.56 and 156,028.64

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Solution

The fourth proportional to 425,935.52, 638,962.56 and 156,028.64 is: 234,064.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,935.52 : 638,962.56 = 156,028.64 : x
  2. Step 2: Convert to fraction form
    425,935.52/638,962.56 = 156,028.64/x
  3. Step 3: Cross multiply
    425,935.52x = 638,962.56 × 156,028.64
  4. Step 4: Simplify right side
    425,935.52x = 99,696,459,247.72
  5. Step 5: Solve for x
    x = 99,696,459,247.72/425,935.52
  6. Step 6: Final answer
    x = 234,064.68

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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.