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Finding the Fourth Proportional to 711,659.88, 982,115.15 and 389,369.97

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Solution

The fourth proportional to 711,659.88, 982,115.15 and 389,369.97 is: 537,343.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,659.88 : 982,115.15 = 389,369.97 : x
  2. Step 2: Convert to fraction form
    711,659.88/982,115.15 = 389,369.97/x
  3. Step 3: Cross multiply
    711,659.88x = 982,115.15 × 389,369.97
  4. Step 4: Simplify right side
    711,659.88x = 382,406,144,545.20
  5. Step 5: Solve for x
    x = 382,406,144,545.20/711,659.88
  6. Step 6: Final answer
    x = 537,343.97

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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.