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Finding the Fourth Proportional to 863.66, 1,191.48 and 576.30

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Solution

The fourth proportional to 863.66, 1,191.48 and 576.30 is: 795.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.66 : 1,191.48 = 576.30 : x
  2. Step 2: Convert to fraction form
    863.66/1,191.48 = 576.30/x
  3. Step 3: Cross multiply
    863.66x = 1,191.48 × 576.30
  4. Step 4: Simplify right side
    863.66x = 686,649.92
  5. Step 5: Solve for x
    x = 686,649.92/863.66
  6. Step 6: Final answer
    x = 795.05

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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.