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Finding the Fourth Proportional to 1,119.60, 1,544.81 and 726.48

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Solution

The fourth proportional to 1,119.60, 1,544.81 and 726.48 is: 1,002.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.60 : 1,544.81 = 726.48 : x
  2. Step 2: Convert to fraction form
    1,119.60/1,544.81 = 726.48/x
  3. Step 3: Cross multiply
    1,119.60x = 1,544.81 × 726.48
  4. Step 4: Simplify right side
    1,119.60x = 1,122,269.94
  5. Step 5: Solve for x
    x = 1,122,269.94/1,119.60
  6. Step 6: Final answer
    x = 1,002.38

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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.