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Finding the Fourth Proportional to 279,990.90, 386,387.82 and 152,666.49

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Solution

The fourth proportional to 279,990.90, 386,387.82 and 152,666.49 is: 210,679.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,990.90 : 386,387.82 = 152,666.49 : x
  2. Step 2: Convert to fraction form
    279,990.90/386,387.82 = 152,666.49/x
  3. Step 3: Cross multiply
    279,990.90x = 386,387.82 × 152,666.49
  4. Step 4: Simplify right side
    279,990.90x = 58,988,472,258.15
  5. Step 5: Solve for x
    x = 58,988,472,258.15/279,990.90
  6. Step 6: Final answer
    x = 210,679.96

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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.