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Finding the Fourth Proportional to 1,168.61, 1,753.17 and 388.85

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Solution

The fourth proportional to 1,168.61, 1,753.17 and 388.85 is: 583.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.61 : 1,753.17 = 388.85 : x
  2. Step 2: Convert to fraction form
    1,168.61/1,753.17 = 388.85/x
  3. Step 3: Cross multiply
    1,168.61x = 1,753.17 × 388.85
  4. Step 4: Simplify right side
    1,168.61x = 681,720.15
  5. Step 5: Solve for x
    x = 681,720.15/1,168.61
  6. Step 6: Final answer
    x = 583.36

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.