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Finding the Fourth Proportional to 425,705.46, 638,373.10 and 122,032.74

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Solution

The fourth proportional to 425,705.46, 638,373.10 and 122,032.74 is: 182,996.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,705.46 : 638,373.10 = 122,032.74 : x
  2. Step 2: Convert to fraction form
    425,705.46/638,373.10 = 122,032.74/x
  3. Step 3: Cross multiply
    425,705.46x = 638,373.10 × 122,032.74
  4. Step 4: Simplify right side
    425,705.46x = 77,902,418,535.29
  5. Step 5: Solve for x
    x = 77,902,418,535.29/425,705.46
  6. Step 6: Final answer
    x = 182,996.05

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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.