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Finding the Fourth Proportional to 498,316.78, 687,438.04 and 326,158.97

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Solution

The fourth proportional to 498,316.78, 687,438.04 and 326,158.97 is: 449,942.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,316.78 : 687,438.04 = 326,158.97 : x
  2. Step 2: Convert to fraction form
    498,316.78/687,438.04 = 326,158.97/x
  3. Step 3: Cross multiply
    498,316.78x = 687,438.04 × 326,158.97
  4. Step 4: Simplify right side
    498,316.78x = 224,214,081,434.42
  5. Step 5: Solve for x
    x = 224,214,081,434.42/498,316.78
  6. Step 6: Final answer
    x = 449,942.87

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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.