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Finding the Fourth Proportional to 887.19, 1,223.16 and 571.89

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Solution

The fourth proportional to 887.19, 1,223.16 and 571.89 is: 788.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.19 : 1,223.16 = 571.89 : x
  2. Step 2: Convert to fraction form
    887.19/1,223.16 = 571.89/x
  3. Step 3: Cross multiply
    887.19x = 1,223.16 × 571.89
  4. Step 4: Simplify right side
    887.19x = 699,512.97
  5. Step 5: Solve for x
    x = 699,512.97/887.19
  6. Step 6: Final answer
    x = 788.46

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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.