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Finding the Fourth Proportional to 2,572.80, 3,550.47 and 1,393.87

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Solution

The fourth proportional to 2,572.80, 3,550.47 and 1,393.87 is: 1,923.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.80 : 3,550.47 = 1,393.87 : x
  2. Step 2: Convert to fraction form
    2,572.80/3,550.47 = 1,393.87/x
  3. Step 3: Cross multiply
    2,572.80x = 3,550.47 × 1,393.87
  4. Step 4: Simplify right side
    2,572.80x = 4,948,875.87
  5. Step 5: Solve for x
    x = 4,948,875.87/2,572.80
  6. Step 6: Final answer
    x = 1,923.54

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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.