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Finding the Fourth Proportional to 714,999.62, 986,711.73 and 392,723.30

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Solution

The fourth proportional to 714,999.62, 986,711.73 and 392,723.30 is: 541,964.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,999.62 : 986,711.73 = 392,723.30 : x
  2. Step 2: Convert to fraction form
    714,999.62/986,711.73 = 392,723.30/x
  3. Step 3: Cross multiply
    714,999.62x = 986,711.73 × 392,723.30
  4. Step 4: Simplify right side
    714,999.62x = 387,504,686,754.31
  5. Step 5: Solve for x
    x = 387,504,686,754.31/714,999.62
  6. Step 6: Final answer
    x = 541,964.88

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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.