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Finding the Fourth Proportional to 677.38, 934.78 and 382.76

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Solution

The fourth proportional to 677.38, 934.78 and 382.76 is: 528.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.38 : 934.78 = 382.76 : x
  2. Step 2: Convert to fraction form
    677.38/934.78 = 382.76/x
  3. Step 3: Cross multiply
    677.38x = 934.78 × 382.76
  4. Step 4: Simplify right side
    677.38x = 357,796.39
  5. Step 5: Solve for x
    x = 357,796.39/677.38
  6. Step 6: Final answer
    x = 528.21

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1.5x scale

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.