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Finding the Fourth Proportional to 677.92, 935.44 and 538.40

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Solution

The fourth proportional to 677.92, 935.44 and 538.40 is: 742.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.92 : 935.44 = 538.40 : x
  2. Step 2: Convert to fraction form
    677.92/935.44 = 538.40/x
  3. Step 3: Cross multiply
    677.92x = 935.44 × 538.40
  4. Step 4: Simplify right side
    677.92x = 503,640.90
  5. Step 5: Solve for x
    x = 503,640.90/677.92
  6. Step 6: Final answer
    x = 742.92

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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.