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Finding the Fourth Proportional to 718,898.46, 992,078.67 and 392,211.45

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Solution

The fourth proportional to 718,898.46, 992,078.67 and 392,211.45 is: 541,251.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,898.46 : 992,078.67 = 392,211.45 : x
  2. Step 2: Convert to fraction form
    718,898.46/992,078.67 = 392,211.45/x
  3. Step 3: Cross multiply
    718,898.46x = 992,078.67 × 392,211.45
  4. Step 4: Simplify right side
    718,898.46x = 389,104,613,674.77
  5. Step 5: Solve for x
    x = 389,104,613,674.77/718,898.46
  6. Step 6: Final answer
    x = 541,251.14

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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.