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Finding the Fourth Proportional to 498,488.72, 687,910.93 and 272,134.22

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Solution

The fourth proportional to 498,488.72, 687,910.93 and 272,134.22 is: 375,543.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,488.72 : 687,910.93 = 272,134.22 : x
  2. Step 2: Convert to fraction form
    498,488.72/687,910.93 = 272,134.22/x
  3. Step 3: Cross multiply
    498,488.72x = 687,910.93 × 272,134.22
  4. Step 4: Simplify right side
    498,488.72x = 187,204,100,245.13
  5. Step 5: Solve for x
    x = 187,204,100,245.13/498,488.72
  6. Step 6: Final answer
    x = 375,543.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.