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Finding the Fourth Proportional to 1,172.60, 1,757.67 and 392.41

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Solution

The fourth proportional to 1,172.60, 1,757.67 and 392.41 is: 588.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.60 : 1,757.67 = 392.41 : x
  2. Step 2: Convert to fraction form
    1,172.60/1,757.67 = 392.41/x
  3. Step 3: Cross multiply
    1,172.60x = 1,757.67 × 392.41
  4. Step 4: Simplify right side
    1,172.60x = 689,727.28
  5. Step 5: Solve for x
    x = 689,727.28/1,172.60
  6. Step 6: Final answer
    x = 588.20

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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.