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Finding the Fourth Proportional to 714,661.96, 986,189.28 and 392,370.24

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Solution

The fourth proportional to 714,661.96, 986,189.28 and 392,370.24 is: 541,446.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,661.96 : 986,189.28 = 392,370.24 : x
  2. Step 2: Convert to fraction form
    714,661.96/986,189.28 = 392,370.24/x
  3. Step 3: Cross multiply
    714,661.96x = 986,189.28 × 392,370.24
  4. Step 4: Simplify right side
    714,661.96x = 386,951,324,479.03
  5. Step 5: Solve for x
    x = 386,951,324,479.03/714,661.96
  6. Step 6: Final answer
    x = 541,446.65

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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.