Home / 756.03-1,131.62-390.32

Finding the Fourth Proportional to 756.03, 1,131.62 and 390.32

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Solution

The fourth proportional to 756.03, 1,131.62 and 390.32 is: 584.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.03 : 1,131.62 = 390.32 : x
  2. Step 2: Convert to fraction form
    756.03/1,131.62 = 390.32/x
  3. Step 3: Cross multiply
    756.03x = 1,131.62 × 390.32
  4. Step 4: Simplify right side
    756.03x = 441,691.97
  5. Step 5: Solve for x
    x = 441,691.97/756.03
  6. Step 6: Final answer
    x = 584.23

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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.