Home / 428,633.76-642,901.33-113,115.27

Finding the Fourth Proportional to 428,633.76, 642,901.33 and 113,115.27

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Solution

The fourth proportional to 428,633.76, 642,901.33 and 113,115.27 is: 169,659.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,633.76 : 642,901.33 = 113,115.27 : x
  2. Step 2: Convert to fraction form
    428,633.76/642,901.33 = 113,115.27/x
  3. Step 3: Cross multiply
    428,633.76x = 642,901.33 × 113,115.27
  4. Step 4: Simplify right side
    428,633.76x = 72,721,957,526.31
  5. Step 5: Solve for x
    x = 72,721,957,526.31/428,633.76
  6. Step 6: Final answer
    x = 169,659.89

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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.