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Finding the Fourth Proportional to 863.03, 1,190.85 and 531.29

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Solution

The fourth proportional to 863.03, 1,190.85 and 531.29 is: 733.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.03 : 1,190.85 = 531.29 : x
  2. Step 2: Convert to fraction form
    863.03/1,190.85 = 531.29/x
  3. Step 3: Cross multiply
    863.03x = 1,190.85 × 531.29
  4. Step 4: Simplify right side
    863.03x = 632,686.70
  5. Step 5: Solve for x
    x = 632,686.70/863.03
  6. Step 6: Final answer
    x = 733.10

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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.