Home / 428,264.20-642,177.60-158,378.68

Finding the Fourth Proportional to 428,264.20, 642,177.60 and 158,378.68

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Solution

The fourth proportional to 428,264.20, 642,177.60 and 158,378.68 is: 237,487.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,264.20 : 642,177.60 = 158,378.68 : x
  2. Step 2: Convert to fraction form
    428,264.20/642,177.60 = 158,378.68/x
  3. Step 3: Cross multiply
    428,264.20x = 642,177.60 × 158,378.68
  4. Step 4: Simplify right side
    428,264.20x = 101,707,240,613.57
  5. Step 5: Solve for x
    x = 101,707,240,613.57/428,264.20
  6. Step 6: Final answer
    x = 237,487.14

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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.