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Finding the Fourth Proportional to 963.51, 1,329.60 and 543.90

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Solution

The fourth proportional to 963.51, 1,329.60 and 543.90 is: 750.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.51 : 1,329.60 = 543.90 : x
  2. Step 2: Convert to fraction form
    963.51/1,329.60 = 543.90/x
  3. Step 3: Cross multiply
    963.51x = 1,329.60 × 543.90
  4. Step 4: Simplify right side
    963.51x = 723,169.44
  5. Step 5: Solve for x
    x = 723,169.44/963.51
  6. Step 6: Final answer
    x = 750.56

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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.