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Finding the Fourth Proportional to 863.76, 1,191.60 and 532.20

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Solution

The fourth proportional to 863.76, 1,191.60 and 532.20 is: 734.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.76 : 1,191.60 = 532.20 : x
  2. Step 2: Convert to fraction form
    863.76/1,191.60 = 532.20/x
  3. Step 3: Cross multiply
    863.76x = 1,191.60 × 532.20
  4. Step 4: Simplify right side
    863.76x = 634,169.52
  5. Step 5: Solve for x
    x = 634,169.52/863.76
  6. Step 6: Final answer
    x = 734.20

Related Problems

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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.