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Finding the Fourth Proportional to 1,503.12, 2,255.60 and 578.76

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Solution

The fourth proportional to 1,503.12, 2,255.60 and 578.76 is: 868.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,503.12 : 2,255.60 = 578.76 : x
  2. Step 2: Convert to fraction form
    1,503.12/2,255.60 = 578.76/x
  3. Step 3: Cross multiply
    1,503.12x = 2,255.60 × 578.76
  4. Step 4: Simplify right side
    1,503.12x = 1,305,453.48
  5. Step 5: Solve for x
    x = 1,305,453.48/1,503.12
  6. Step 6: Final answer
    x = 868.49

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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.