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Finding the Fourth Proportional to 756.66, 1,134.99 and 432.27

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Solution

The fourth proportional to 756.66, 1,134.99 and 432.27 is: 648.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.66 : 1,134.99 = 432.27 : x
  2. Step 2: Convert to fraction form
    756.66/1,134.99 = 432.27/x
  3. Step 3: Cross multiply
    756.66x = 1,134.99 × 432.27
  4. Step 4: Simplify right side
    756.66x = 490,622.13
  5. Step 5: Solve for x
    x = 490,622.13/756.66
  6. Step 6: Final answer
    x = 648.41

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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.