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Finding the Fourth Proportional to 498,728.82, 688,246.56 and 283,868.90

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Solution

The fourth proportional to 498,728.82, 688,246.56 and 283,868.90 is: 391,739.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,728.82 : 688,246.56 = 283,868.90 : x
  2. Step 2: Convert to fraction form
    498,728.82/688,246.56 = 283,868.90/x
  3. Step 3: Cross multiply
    498,728.82x = 688,246.56 × 283,868.90
  4. Step 4: Simplify right side
    498,728.82x = 195,371,793,915.98
  5. Step 5: Solve for x
    x = 195,371,793,915.98/498,728.82
  6. Step 6: Final answer
    x = 391,739.53

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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.