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Finding the Fourth Proportional to 498,460.78, 687,887.67 and 272,107.90

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Solution

The fourth proportional to 498,460.78, 687,887.67 and 272,107.90 is: 375,515.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,460.78 : 687,887.67 = 272,107.90 : x
  2. Step 2: Convert to fraction form
    498,460.78/687,887.67 = 272,107.90/x
  3. Step 3: Cross multiply
    498,460.78x = 687,887.67 × 272,107.90
  4. Step 4: Simplify right side
    498,460.78x = 187,179,669,319.59
  5. Step 5: Solve for x
    x = 187,179,669,319.59/498,460.78
  6. Step 6: Final answer
    x = 375,515.34

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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.