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Finding the Fourth Proportional to 498,687.60, 688,194.36 and 272,339.76

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Solution

The fourth proportional to 498,687.60, 688,194.36 and 272,339.76 is: 375,831.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,687.60 : 688,194.36 = 272,339.76 : x
  2. Step 2: Convert to fraction form
    498,687.60/688,194.36 = 272,339.76/x
  3. Step 3: Cross multiply
    498,687.60x = 688,194.36 × 272,339.76
  4. Step 4: Simplify right side
    498,687.60x = 187,422,686,835.75
  5. Step 5: Solve for x
    x = 187,422,686,835.75/498,687.60
  6. Step 6: Final answer
    x = 375,831.86

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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.