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Finding the Fourth Proportional to 866.59, 1,196.28 and 667.35

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Solution

The fourth proportional to 866.59, 1,196.28 and 667.35 is: 921.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.59 : 1,196.28 = 667.35 : x
  2. Step 2: Convert to fraction form
    866.59/1,196.28 = 667.35/x
  3. Step 3: Cross multiply
    866.59x = 1,196.28 × 667.35
  4. Step 4: Simplify right side
    866.59x = 798,328.29
  5. Step 5: Solve for x
    x = 798,328.29/866.59
  6. Step 6: Final answer
    x = 921.23

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Double scale
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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.