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Finding the Fourth Proportional to 898.57, 1,240.17 and 677.13

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Solution

The fourth proportional to 898.57, 1,240.17 and 677.13 is: 934.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.57 : 1,240.17 = 677.13 : x
  2. Step 2: Convert to fraction form
    898.57/1,240.17 = 677.13/x
  3. Step 3: Cross multiply
    898.57x = 1,240.17 × 677.13
  4. Step 4: Simplify right side
    898.57x = 839,756.31
  5. Step 5: Solve for x
    x = 839,756.31/898.57
  6. Step 6: Final answer
    x = 934.55

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Double scale
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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.