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Finding the Fourth Proportional to 963.18, 1,328.18 and 714.98

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Solution

The fourth proportional to 963.18, 1,328.18 and 714.98 is: 985.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.18 : 1,328.18 = 714.98 : x
  2. Step 2: Convert to fraction form
    963.18/1,328.18 = 714.98/x
  3. Step 3: Cross multiply
    963.18x = 1,328.18 × 714.98
  4. Step 4: Simplify right side
    963.18x = 949,622.14
  5. Step 5: Solve for x
    x = 949,622.14/963.18
  6. Step 6: Final answer
    x = 985.92

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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.