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Finding the Fourth Proportional to 886.30, 1,223.19 and 513.27

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Solution

The fourth proportional to 886.30, 1,223.19 and 513.27 is: 708.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.30 : 1,223.19 = 513.27 : x
  2. Step 2: Convert to fraction form
    886.30/1,223.19 = 513.27/x
  3. Step 3: Cross multiply
    886.30x = 1,223.19 × 513.27
  4. Step 4: Simplify right side
    886.30x = 627,826.73
  5. Step 5: Solve for x
    x = 627,826.73/886.30
  6. Step 6: Final answer
    x = 708.37

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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.