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Finding the Fourth Proportional to 279,312.16, 418,819.20 and 145,869.52

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Solution

The fourth proportional to 279,312.16, 418,819.20 and 145,869.52 is: 218,726.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,312.16 : 418,819.20 = 145,869.52 : x
  2. Step 2: Convert to fraction form
    279,312.16/418,819.20 = 145,869.52/x
  3. Step 3: Cross multiply
    279,312.16x = 418,819.20 × 145,869.52
  4. Step 4: Simplify right side
    279,312.16x = 61,092,955,670.78
  5. Step 5: Solve for x
    x = 61,092,955,670.78/279,312.16
  6. Step 6: Final answer
    x = 218,726.44

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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.