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Finding the Fourth Proportional to 966.20, 1,330.20 and 899.96

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Solution

The fourth proportional to 966.20, 1,330.20 and 899.96 is: 1,239.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.20 : 1,330.20 = 899.96 : x
  2. Step 2: Convert to fraction form
    966.20/1,330.20 = 899.96/x
  3. Step 3: Cross multiply
    966.20x = 1,330.20 × 899.96
  4. Step 4: Simplify right side
    966.20x = 1,197,126.79
  5. Step 5: Solve for x
    x = 1,197,126.79/966.20
  6. Step 6: Final answer
    x = 1,239.01

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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.