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Finding the Fourth Proportional to 966.60, 1,333.86 and 617.40

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Solution

The fourth proportional to 966.60, 1,333.86 and 617.40 is: 851.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.60 : 1,333.86 = 617.40 : x
  2. Step 2: Convert to fraction form
    966.60/1,333.86 = 617.40/x
  3. Step 3: Cross multiply
    966.60x = 1,333.86 × 617.40
  4. Step 4: Simplify right side
    966.60x = 823,525.16
  5. Step 5: Solve for x
    x = 823,525.16/966.60
  6. Step 6: Final answer
    x = 851.98

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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.