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Finding the Fourth Proportional to 410,839.20, 616,258.80 and 115,312.80

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Solution

The fourth proportional to 410,839.20, 616,258.80 and 115,312.80 is: 172,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,839.20 : 616,258.80 = 115,312.80 : x
  2. Step 2: Convert to fraction form
    410,839.20/616,258.80 = 115,312.80/x
  3. Step 3: Cross multiply
    410,839.20x = 616,258.80 × 115,312.80
  4. Step 4: Simplify right side
    410,839.20x = 71,062,527,752.64
  5. Step 5: Solve for x
    x = 71,062,527,752.64/410,839.20
  6. Step 6: Final answer
    x = 172,969.20

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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.