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Finding the Fourth Proportional to 887.20, 1,224.32 and 514.18

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Solution

The fourth proportional to 887.20, 1,224.32 and 514.18 is: 709.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.20 : 1,224.32 = 514.18 : x
  2. Step 2: Convert to fraction form
    887.20/1,224.32 = 514.18/x
  3. Step 3: Cross multiply
    887.20x = 1,224.32 × 514.18
  4. Step 4: Simplify right side
    887.20x = 629,520.86
  5. Step 5: Solve for x
    x = 629,520.86/887.20
  6. Step 6: Final answer
    x = 709.56

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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.