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Finding the Fourth Proportional to 681.43, 934.05 and 671.84

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Solution

The fourth proportional to 681.43, 934.05 and 671.84 is: 920.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.43 : 934.05 = 671.84 : x
  2. Step 2: Convert to fraction form
    681.43/934.05 = 671.84/x
  3. Step 3: Cross multiply
    681.43x = 934.05 × 671.84
  4. Step 4: Simplify right side
    681.43x = 627,532.15
  5. Step 5: Solve for x
    x = 627,532.15/681.43
  6. Step 6: Final answer
    x = 920.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.