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Finding the Fourth Proportional to 279,380.92, 385,545.80 and 152,057.40

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Solution

The fourth proportional to 279,380.92, 385,545.80 and 152,057.40 is: 209,839.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,380.92 : 385,545.80 = 152,057.40 : x
  2. Step 2: Convert to fraction form
    279,380.92/385,545.80 = 152,057.40/x
  3. Step 3: Cross multiply
    279,380.92x = 385,545.80 × 152,057.40
  4. Step 4: Simplify right side
    279,380.92x = 58,625,091,928.92
  5. Step 5: Solve for x
    x = 58,625,091,928.92/279,380.92
  6. Step 6: Final answer
    x = 209,839.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.