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Finding the Fourth Proportional to 863.66, 1,192.02 and 654.55

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Solution

The fourth proportional to 863.66, 1,192.02 and 654.55 is: 903.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.66 : 1,192.02 = 654.55 : x
  2. Step 2: Convert to fraction form
    863.66/1,192.02 = 654.55/x
  3. Step 3: Cross multiply
    863.66x = 1,192.02 × 654.55
  4. Step 4: Simplify right side
    863.66x = 780,231.26
  5. Step 5: Solve for x
    x = 780,231.26/863.66
  6. Step 6: Final answer
    x = 903.40

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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.