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Finding the Fourth Proportional to 886.97, 1,223.55 and 572.15

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Solution

The fourth proportional to 886.97, 1,223.55 and 572.15 is: 789.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.97 : 1,223.55 = 572.15 : x
  2. Step 2: Convert to fraction form
    886.97/1,223.55 = 572.15/x
  3. Step 3: Cross multiply
    886.97x = 1,223.55 × 572.15
  4. Step 4: Simplify right side
    886.97x = 700,054.13
  5. Step 5: Solve for x
    x = 700,054.13/886.97
  6. Step 6: Final answer
    x = 789.26

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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.