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Finding the Fourth Proportional to 753.52, 1,130.76 and 320.68

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Solution

The fourth proportional to 753.52, 1,130.76 and 320.68 is: 481.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.52 : 1,130.76 = 320.68 : x
  2. Step 2: Convert to fraction form
    753.52/1,130.76 = 320.68/x
  3. Step 3: Cross multiply
    753.52x = 1,130.76 × 320.68
  4. Step 4: Simplify right side
    753.52x = 362,609.29
  5. Step 5: Solve for x
    x = 362,609.29/753.52
  6. Step 6: Final answer
    x = 481.22

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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.