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Finding the Fourth Proportional to 1,173.92, 1,761.14 and 393.95

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Solution

The fourth proportional to 1,173.92, 1,761.14 and 393.95 is: 591.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.92 : 1,761.14 = 393.95 : x
  2. Step 2: Convert to fraction form
    1,173.92/1,761.14 = 393.95/x
  3. Step 3: Cross multiply
    1,173.92x = 1,761.14 × 393.95
  4. Step 4: Simplify right side
    1,173.92x = 693,801.10
  5. Step 5: Solve for x
    x = 693,801.10/1,173.92
  6. Step 6: Final answer
    x = 591.01

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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.