Home / 428,358.60-642,592.98-143,926.29

Finding the Fourth Proportional to 428,358.60, 642,592.98 and 143,926.29

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Solution

The fourth proportional to 428,358.60, 642,592.98 and 143,926.29 is: 215,907.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,358.60 : 642,592.98 = 143,926.29 : x
  2. Step 2: Convert to fraction form
    428,358.60/642,592.98 = 143,926.29/x
  3. Step 3: Cross multiply
    428,358.60x = 642,592.98 × 143,926.29
  4. Step 4: Simplify right side
    428,358.60x = 92,486,023,591.44
  5. Step 5: Solve for x
    x = 92,486,023,591.44/428,358.60
  6. Step 6: Final answer
    x = 215,907.94

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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.