Home / 428,542.62-642,420.27-229,000.74

Finding the Fourth Proportional to 428,542.62, 642,420.27 and 229,000.74

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Solution

The fourth proportional to 428,542.62, 642,420.27 and 229,000.74 is: 343,290.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,542.62 : 642,420.27 = 229,000.74 : x
  2. Step 2: Convert to fraction form
    428,542.62/642,420.27 = 229,000.74/x
  3. Step 3: Cross multiply
    428,542.62x = 642,420.27 × 229,000.74
  4. Step 4: Simplify right side
    428,542.62x = 147,114,717,221.00
  5. Step 5: Solve for x
    x = 147,114,717,221.00/428,542.62
  6. Step 6: Final answer
    x = 343,290.75

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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.