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Finding the Fourth Proportional to 677.43, 934.50 and 428.32

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Solution

The fourth proportional to 677.43, 934.50 and 428.32 is: 590.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.43 : 934.50 = 428.32 : x
  2. Step 2: Convert to fraction form
    677.43/934.50 = 428.32/x
  3. Step 3: Cross multiply
    677.43x = 934.50 × 428.32
  4. Step 4: Simplify right side
    677.43x = 400,262.70
  5. Step 5: Solve for x
    x = 400,262.70/677.43
  6. Step 6: Final answer
    x = 590.85

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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.