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Finding the Fourth Proportional to 886.11, 1,222.71 and 513.15

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Solution

The fourth proportional to 886.11, 1,222.71 and 513.15 is: 708.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.11 : 1,222.71 = 513.15 : x
  2. Step 2: Convert to fraction form
    886.11/1,222.71 = 513.15/x
  3. Step 3: Cross multiply
    886.11x = 1,222.71 × 513.15
  4. Step 4: Simplify right side
    886.11x = 627,433.64
  5. Step 5: Solve for x
    x = 627,433.64/886.11
  6. Step 6: Final answer
    x = 708.08

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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.