Home / 428,215.68-642,333.96-143,910.42

Finding the Fourth Proportional to 428,215.68, 642,333.96 and 143,910.42

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Solution

The fourth proportional to 428,215.68, 642,333.96 and 143,910.42 is: 215,869.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,215.68 : 642,333.96 = 143,910.42 : x
  2. Step 2: Convert to fraction form
    428,215.68/642,333.96 = 143,910.42/x
  3. Step 3: Cross multiply
    428,215.68x = 642,333.96 × 143,910.42
  4. Step 4: Simplify right side
    428,215.68x = 92,438,549,963.86
  5. Step 5: Solve for x
    x = 92,438,549,963.86/428,215.68
  6. Step 6: Final answer
    x = 215,869.14

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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.