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Finding the Fourth Proportional to 715,178.55, 986,935.49 and 388,489.96

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Solution

The fourth proportional to 715,178.55, 986,935.49 and 388,489.96 is: 536,110.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,178.55 : 986,935.49 = 388,489.96 : x
  2. Step 2: Convert to fraction form
    715,178.55/986,935.49 = 388,489.96/x
  3. Step 3: Cross multiply
    715,178.55x = 986,935.49 × 388,489.96
  4. Step 4: Simplify right side
    715,178.55x = 383,414,524,229.23
  5. Step 5: Solve for x
    x = 383,414,524,229.23/715,178.55
  6. Step 6: Final answer
    x = 536,110.21

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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.