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Finding the Fourth Proportional to 310,631.36, 465,947.68 and 85,992.48

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Solution

The fourth proportional to 310,631.36, 465,947.68 and 85,992.48 is: 128,988.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,631.36 : 465,947.68 = 85,992.48 : x
  2. Step 2: Convert to fraction form
    310,631.36/465,947.68 = 85,992.48/x
  3. Step 3: Cross multiply
    310,631.36x = 465,947.68 × 85,992.48
  4. Step 4: Simplify right side
    310,631.36x = 40,067,996,553.45
  5. Step 5: Solve for x
    x = 40,067,996,553.45/310,631.36
  6. Step 6: Final answer
    x = 128,988.90

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Similar ratio
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1.5x scale

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.