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Finding the Fourth Proportional to 887.40, 1,223.94 and 572.44

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Solution

The fourth proportional to 887.40, 1,223.94 and 572.44 is: 789.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.40 : 1,223.94 = 572.44 : x
  2. Step 2: Convert to fraction form
    887.40/1,223.94 = 572.44/x
  3. Step 3: Cross multiply
    887.40x = 1,223.94 × 572.44
  4. Step 4: Simplify right side
    887.40x = 700,632.21
  5. Step 5: Solve for x
    x = 700,632.21/887.40
  6. Step 6: Final answer
    x = 789.53

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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.