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Finding the Fourth Proportional to 498,371.62, 687,513.52 and 326,213.72

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Solution

The fourth proportional to 498,371.62, 687,513.52 and 326,213.72 is: 450,018.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,371.62 : 687,513.52 = 326,213.72 : x
  2. Step 2: Convert to fraction form
    498,371.62/687,513.52 = 326,213.72/x
  3. Step 3: Cross multiply
    498,371.62x = 687,513.52 × 326,213.72
  4. Step 4: Simplify right side
    498,371.62x = 224,276,341,491.05
  5. Step 5: Solve for x
    x = 224,276,341,491.05/498,371.62
  6. Step 6: Final answer
    x = 450,018.28

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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.