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Finding the Fourth Proportional to 318,876.48, 478,339.44 and 129,246.60

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Solution

The fourth proportional to 318,876.48, 478,339.44 and 129,246.60 is: 193,879.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,876.48 : 478,339.44 = 129,246.60 : x
  2. Step 2: Convert to fraction form
    318,876.48/478,339.44 = 129,246.60/x
  3. Step 3: Cross multiply
    318,876.48x = 478,339.44 × 129,246.60
  4. Step 4: Simplify right side
    318,876.48x = 61,823,746,265.90
  5. Step 5: Solve for x
    x = 61,823,746,265.90/318,876.48
  6. Step 6: Final answer
    x = 193,879.92

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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.