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Finding the Fourth Proportional to 677.87, 935.45 and 383.15

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Solution

The fourth proportional to 677.87, 935.45 and 383.15 is: 528.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.87 : 935.45 = 383.15 : x
  2. Step 2: Convert to fraction form
    677.87/935.45 = 383.15/x
  3. Step 3: Cross multiply
    677.87x = 935.45 × 383.15
  4. Step 4: Simplify right side
    677.87x = 358,414.27
  5. Step 5: Solve for x
    x = 358,414.27/677.87
  6. Step 6: Final answer
    x = 528.74

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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.