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Finding the Fourth Proportional to 420,879.68, 631,325.28 and 235,073.60

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Solution

The fourth proportional to 420,879.68, 631,325.28 and 235,073.60 is: 352,613.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,879.68 : 631,325.28 = 235,073.60 : x
  2. Step 2: Convert to fraction form
    420,879.68/631,325.28 = 235,073.60/x
  3. Step 3: Cross multiply
    420,879.68x = 631,325.28 × 235,073.60
  4. Step 4: Simplify right side
    420,879.68x = 148,407,906,340.61
  5. Step 5: Solve for x
    x = 148,407,906,340.61/420,879.68
  6. Step 6: Final answer
    x = 352,613.62

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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.