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Finding the Fourth Proportional to 963.90, 1,329.57 and 727.47

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Solution

The fourth proportional to 963.90, 1,329.57 and 727.47 is: 1,003.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.90 : 1,329.57 = 727.47 : x
  2. Step 2: Convert to fraction form
    963.90/1,329.57 = 727.47/x
  3. Step 3: Cross multiply
    963.90x = 1,329.57 × 727.47
  4. Step 4: Simplify right side
    963.90x = 967,222.29
  5. Step 5: Solve for x
    x = 967,222.29/963.90
  6. Step 6: Final answer
    x = 1,003.45

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1.5x scale

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.