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Finding the Fourth Proportional to 963.64, 1,328.34 and 710.92

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Solution

The fourth proportional to 963.64, 1,328.34 and 710.92 is: 979.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.64 : 1,328.34 = 710.92 : x
  2. Step 2: Convert to fraction form
    963.64/1,328.34 = 710.92/x
  3. Step 3: Cross multiply
    963.64x = 1,328.34 × 710.92
  4. Step 4: Simplify right side
    963.64x = 944,343.47
  5. Step 5: Solve for x
    x = 944,343.47/963.64
  6. Step 6: Final answer
    x = 979.98

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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.