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Finding the Fourth Proportional to 886.84, 1,224.11 and 513.91

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Solution

The fourth proportional to 886.84, 1,224.11 and 513.91 is: 709.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.84 : 1,224.11 = 513.91 : x
  2. Step 2: Convert to fraction form
    886.84/1,224.11 = 513.91/x
  3. Step 3: Cross multiply
    886.84x = 1,224.11 × 513.91
  4. Step 4: Simplify right side
    886.84x = 629,079.80
  5. Step 5: Solve for x
    x = 629,079.80/886.84
  6. Step 6: Final answer
    x = 709.35

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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.