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Finding the Fourth Proportional to 409,712.70, 614,569.05 and 251,427.90

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Solution

The fourth proportional to 409,712.70, 614,569.05 and 251,427.90 is: 377,141.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,712.70 : 614,569.05 = 251,427.90 : x
  2. Step 2: Convert to fraction form
    409,712.70/614,569.05 = 251,427.90/x
  3. Step 3: Cross multiply
    409,712.70x = 614,569.05 × 251,427.90
  4. Step 4: Simplify right side
    409,712.70x = 154,519,805,646.50
  5. Step 5: Solve for x
    x = 154,519,805,646.50/409,712.70
  6. Step 6: Final answer
    x = 377,141.85

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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.