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Finding the Fourth Proportional to 966.02, 1,331.56 and 685.68

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Solution

The fourth proportional to 966.02, 1,331.56 and 685.68 is: 945.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.02 : 1,331.56 = 685.68 : x
  2. Step 2: Convert to fraction form
    966.02/1,331.56 = 685.68/x
  3. Step 3: Cross multiply
    966.02x = 1,331.56 × 685.68
  4. Step 4: Simplify right side
    966.02x = 913,024.06
  5. Step 5: Solve for x
    x = 913,024.06/966.02
  6. Step 6: Final answer
    x = 945.14

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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.