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Finding the Fourth Proportional to 963.30, 1,330.12 and 717.27

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Solution

The fourth proportional to 963.30, 1,330.12 and 717.27 is: 990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.30 : 1,330.12 = 717.27 : x
  2. Step 2: Convert to fraction form
    963.30/1,330.12 = 717.27/x
  3. Step 3: Cross multiply
    963.30x = 1,330.12 × 717.27
  4. Step 4: Simplify right side
    963.30x = 954,055.17
  5. Step 5: Solve for x
    x = 954,055.17/963.30
  6. Step 6: Final answer
    x = 990.40

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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.