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Finding the Fourth Proportional to 1,503.78, 2,255.21 and 579.27

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Solution

The fourth proportional to 1,503.78, 2,255.21 and 579.27 is: 868.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,503.78 : 2,255.21 = 579.27 : x
  2. Step 2: Convert to fraction form
    1,503.78/2,255.21 = 579.27/x
  3. Step 3: Cross multiply
    1,503.78x = 2,255.21 × 579.27
  4. Step 4: Simplify right side
    1,503.78x = 1,306,365.67
  5. Step 5: Solve for x
    x = 1,306,365.67/1,503.78
  6. Step 6: Final answer
    x = 868.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.