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Finding the Fourth Proportional to 755.46, 1,132.58 and 322.31

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Solution

The fourth proportional to 755.46, 1,132.58 and 322.31 is: 483.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.46 : 1,132.58 = 322.31 : x
  2. Step 2: Convert to fraction form
    755.46/1,132.58 = 322.31/x
  3. Step 3: Cross multiply
    755.46x = 1,132.58 × 322.31
  4. Step 4: Simplify right side
    755.46x = 365,045.50
  5. Step 5: Solve for x
    x = 365,045.50/755.46
  6. Step 6: Final answer
    x = 483.21

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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.