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Finding the Fourth Proportional to 711,575.62, 981,972.57 and 389,284.90

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Solution

The fourth proportional to 711,575.62, 981,972.57 and 389,284.90 is: 537,212.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,575.62 : 981,972.57 = 389,284.90 : x
  2. Step 2: Convert to fraction form
    711,575.62/981,972.57 = 389,284.90/x
  3. Step 3: Cross multiply
    711,575.62x = 981,972.57 × 389,284.90
  4. Step 4: Simplify right side
    711,575.62x = 382,267,093,715.19
  5. Step 5: Solve for x
    x = 382,267,093,715.19/711,575.62
  6. Step 6: Final answer
    x = 537,212.19

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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.