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Finding the Fourth Proportional to 887.18, 1,223.94 and 572.36

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Solution

The fourth proportional to 887.18, 1,223.94 and 572.36 is: 789.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.18 : 1,223.94 = 572.36 : x
  2. Step 2: Convert to fraction form
    887.18/1,223.94 = 572.36/x
  3. Step 3: Cross multiply
    887.18x = 1,223.94 × 572.36
  4. Step 4: Simplify right side
    887.18x = 700,534.30
  5. Step 5: Solve for x
    x = 700,534.30/887.18
  6. Step 6: Final answer
    x = 789.62

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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.