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Finding the Fourth Proportional to 279,981.92, 386,366.64 and 152,660

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Solution

The fourth proportional to 279,981.92, 386,366.64 and 152,660 is: 210,666.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,981.92 : 386,366.64 = 152,660 : x
  2. Step 2: Convert to fraction form
    279,981.92/386,366.64 = 152,660/x
  3. Step 3: Cross multiply
    279,981.92x = 386,366.64 × 152,660
  4. Step 4: Simplify right side
    279,981.92x = 58,982,731,262.40
  5. Step 5: Solve for x
    x = 58,982,731,262.40/279,981.92
  6. Step 6: Final answer
    x = 210,666.21

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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.