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Finding the Fourth Proportional to 966.06, 1,331.76 and 788.70

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Solution

The fourth proportional to 966.06, 1,331.76 and 788.70 is: 1,087.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.06 : 1,331.76 = 788.70 : x
  2. Step 2: Convert to fraction form
    966.06/1,331.76 = 788.70/x
  3. Step 3: Cross multiply
    966.06x = 1,331.76 × 788.70
  4. Step 4: Simplify right side
    966.06x = 1,050,359.11
  5. Step 5: Solve for x
    x = 1,050,359.11/966.06
  6. Step 6: Final answer
    x = 1,087.26

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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.