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Finding the Fourth Proportional to 279,818.31, 386,138.00 and 152,491.17

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Solution

The fourth proportional to 279,818.31, 386,138.00 and 152,491.17 is: 210,431.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,818.31 : 386,138.00 = 152,491.17 : x
  2. Step 2: Convert to fraction form
    279,818.31/386,138.00 = 152,491.17/x
  3. Step 3: Cross multiply
    279,818.31x = 386,138.00 × 152,491.17
  4. Step 4: Simplify right side
    279,818.31x = 58,882,635,782.69
  5. Step 5: Solve for x
    x = 58,882,635,782.69/279,818.31
  6. Step 6: Final answer
    x = 210,431.68

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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.