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Finding the Fourth Proportional to 966.60, 1,334.07 and 718.20

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Solution

The fourth proportional to 966.60, 1,334.07 and 718.20 is: 991.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.60 : 1,334.07 = 718.20 : x
  2. Step 2: Convert to fraction form
    966.60/1,334.07 = 718.20/x
  3. Step 3: Cross multiply
    966.60x = 1,334.07 × 718.20
  4. Step 4: Simplify right side
    966.60x = 958,129.07
  5. Step 5: Solve for x
    x = 958,129.07/966.60
  6. Step 6: Final answer
    x = 991.24

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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.