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Finding the Fourth Proportional to 756.99, 1,135.82 and 392.04

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Solution

The fourth proportional to 756.99, 1,135.82 and 392.04 is: 588.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.99 : 1,135.82 = 392.04 : x
  2. Step 2: Convert to fraction form
    756.99/1,135.82 = 392.04/x
  3. Step 3: Cross multiply
    756.99x = 1,135.82 × 392.04
  4. Step 4: Simplify right side
    756.99x = 445,279.23
  5. Step 5: Solve for x
    x = 445,279.23/756.99
  6. Step 6: Final answer
    x = 588.22

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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.