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Finding the Fourth Proportional to 863.23, 1,191.21 and 470.26

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Solution

The fourth proportional to 863.23, 1,191.21 and 470.26 is: 648.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.23 : 1,191.21 = 470.26 : x
  2. Step 2: Convert to fraction form
    863.23/1,191.21 = 470.26/x
  3. Step 3: Cross multiply
    863.23x = 1,191.21 × 470.26
  4. Step 4: Simplify right side
    863.23x = 560,175.41
  5. Step 5: Solve for x
    x = 560,175.41/863.23
  6. Step 6: Final answer
    x = 648.93

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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.