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Finding the Fourth Proportional to 962.74, 1,328.63 and 543.11

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Solution

The fourth proportional to 962.74, 1,328.63 and 543.11 is: 749.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.74 : 1,328.63 = 543.11 : x
  2. Step 2: Convert to fraction form
    962.74/1,328.63 = 543.11/x
  3. Step 3: Cross multiply
    962.74x = 1,328.63 × 543.11
  4. Step 4: Simplify right side
    962.74x = 721,589.52
  5. Step 5: Solve for x
    x = 721,589.52/962.74
  6. Step 6: Final answer
    x = 749.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.