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Finding the Fourth Proportional to 279,979.92, 386,363.88 and 152,658

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Solution

The fourth proportional to 279,979.92, 386,363.88 and 152,658 is: 210,663.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,979.92 : 386,363.88 = 152,658 : x
  2. Step 2: Convert to fraction form
    279,979.92/386,363.88 = 152,658/x
  3. Step 3: Cross multiply
    279,979.92x = 386,363.88 × 152,658
  4. Step 4: Simplify right side
    279,979.92x = 58,981,537,193.04
  5. Step 5: Solve for x
    x = 58,981,537,193.04/279,979.92
  6. Step 6: Final answer
    x = 210,663.45

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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.