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Finding the Fourth Proportional to 310,531.76, 428,505.55 and 179,686.80

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Solution

The fourth proportional to 310,531.76, 428,505.55 and 179,686.80 is: 247,951.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,531.76 : 428,505.55 = 179,686.80 : x
  2. Step 2: Convert to fraction form
    310,531.76/428,505.55 = 179,686.80/x
  3. Step 3: Cross multiply
    310,531.76x = 428,505.55 × 179,686.80
  4. Step 4: Simplify right side
    310,531.76x = 76,996,788,919.21
  5. Step 5: Solve for x
    x = 76,996,788,919.21/310,531.76
  6. Step 6: Final answer
    x = 247,951.42

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1.5x scale

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.