Home / 428,766.30-643,149.45-148,311.90

Finding the Fourth Proportional to 428,766.30, 643,149.45 and 148,311.90

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Solution

The fourth proportional to 428,766.30, 643,149.45 and 148,311.90 is: 222,467.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,766.30 : 643,149.45 = 148,311.90 : x
  2. Step 2: Convert to fraction form
    428,766.30/643,149.45 = 148,311.90/x
  3. Step 3: Cross multiply
    428,766.30x = 643,149.45 × 148,311.90
  4. Step 4: Simplify right side
    428,766.30x = 95,386,716,913.46
  5. Step 5: Solve for x
    x = 95,386,716,913.46/428,766.30
  6. Step 6: Final answer
    x = 222,467.85

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Similar ratio
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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.