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Finding the Fourth Proportional to 423,826.92, 635,149.26 and 318,522.60

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Solution

The fourth proportional to 423,826.92, 635,149.26 and 318,522.60 is: 477,339.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,826.92 : 635,149.26 = 318,522.60 : x
  2. Step 2: Convert to fraction form
    423,826.92/635,149.26 = 318,522.60/x
  3. Step 3: Cross multiply
    423,826.92x = 635,149.26 × 318,522.60
  4. Step 4: Simplify right side
    423,826.92x = 202,309,393,683.28
  5. Step 5: Solve for x
    x = 202,309,393,683.28/423,826.92
  6. Step 6: Final answer
    x = 477,339.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.