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Finding the Fourth Proportional to 1,834.78, 2,752.78 and 1,220.90

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Solution

The fourth proportional to 1,834.78, 2,752.78 and 1,220.90 is: 1,831.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,834.78 : 2,752.78 = 1,220.90 : x
  2. Step 2: Convert to fraction form
    1,834.78/2,752.78 = 1,220.90/x
  3. Step 3: Cross multiply
    1,834.78x = 2,752.78 × 1,220.90
  4. Step 4: Simplify right side
    1,834.78x = 3,360,869.10
  5. Step 5: Solve for x
    x = 3,360,869.10/1,834.78
  6. Step 6: Final answer
    x = 1,831.76

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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.