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Finding the Fourth Proportional to 886.52, 1,223.31 and 513.51

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Solution

The fourth proportional to 886.52, 1,223.31 and 513.51 is: 708.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.52 : 1,223.31 = 513.51 : x
  2. Step 2: Convert to fraction form
    886.52/1,223.31 = 513.51/x
  3. Step 3: Cross multiply
    886.52x = 1,223.31 × 513.51
  4. Step 4: Simplify right side
    886.52x = 628,181.92
  5. Step 5: Solve for x
    x = 628,181.92/886.52
  6. Step 6: Final answer
    x = 708.60

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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.