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Finding the Fourth Proportional to 279,978.76, 386,370.66 and 152,654.68

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Solution

The fourth proportional to 279,978.76, 386,370.66 and 152,654.68 is: 210,663.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,978.76 : 386,370.66 = 152,654.68 : x
  2. Step 2: Convert to fraction form
    279,978.76/386,370.66 = 152,654.68/x
  3. Step 3: Cross multiply
    279,978.76x = 386,370.66 × 152,654.68
  4. Step 4: Simplify right side
    279,978.76x = 58,981,289,463.69
  5. Step 5: Solve for x
    x = 58,981,289,463.69/279,978.76
  6. Step 6: Final answer
    x = 210,663.44

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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.