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Finding the Fourth Proportional to 962.62, 1,328.34 and 543.08

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Solution

The fourth proportional to 962.62, 1,328.34 and 543.08 is: 749.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.62 : 1,328.34 = 543.08 : x
  2. Step 2: Convert to fraction form
    962.62/1,328.34 = 543.08/x
  3. Step 3: Cross multiply
    962.62x = 1,328.34 × 543.08
  4. Step 4: Simplify right side
    962.62x = 721,391.57
  5. Step 5: Solve for x
    x = 721,391.57/962.62
  6. Step 6: Final answer
    x = 749.40

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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.