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Finding the Fourth Proportional to 887.12, 1,224.28 and 514.22

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Solution

The fourth proportional to 887.12, 1,224.28 and 514.22 is: 709.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.12 : 1,224.28 = 514.22 : x
  2. Step 2: Convert to fraction form
    887.12/1,224.28 = 514.22/x
  3. Step 3: Cross multiply
    887.12x = 1,224.28 × 514.22
  4. Step 4: Simplify right side
    887.12x = 629,549.26
  5. Step 5: Solve for x
    x = 629,549.26/887.12
  6. Step 6: Final answer
    x = 709.66

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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.