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Finding the Fourth Proportional to 863.48, 1,188.96 and 651.10

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Solution

The fourth proportional to 863.48, 1,188.96 and 651.10 is: 896.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.48 : 1,188.96 = 651.10 : x
  2. Step 2: Convert to fraction form
    863.48/1,188.96 = 651.10/x
  3. Step 3: Cross multiply
    863.48x = 1,188.96 × 651.10
  4. Step 4: Simplify right side
    863.48x = 774,131.86
  5. Step 5: Solve for x
    x = 774,131.86/863.48
  6. Step 6: Final answer
    x = 896.53

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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.