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Finding the Fourth Proportional to 862.76, 1,188.19 and 743.96

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Solution

The fourth proportional to 862.76, 1,188.19 and 743.96 is: 1,024.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.76 : 1,188.19 = 743.96 : x
  2. Step 2: Convert to fraction form
    862.76/1,188.19 = 743.96/x
  3. Step 3: Cross multiply
    862.76x = 1,188.19 × 743.96
  4. Step 4: Simplify right side
    862.76x = 883,965.83
  5. Step 5: Solve for x
    x = 883,965.83/862.76
  6. Step 6: Final answer
    x = 1,024.58

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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.