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Finding the Fourth Proportional to 1,377.76, 1,903.44 and 1,280.56

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Solution

The fourth proportional to 1,377.76, 1,903.44 and 1,280.56 is: 1,769.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.76 : 1,903.44 = 1,280.56 : x
  2. Step 2: Convert to fraction form
    1,377.76/1,903.44 = 1,280.56/x
  3. Step 3: Cross multiply
    1,377.76x = 1,903.44 × 1,280.56
  4. Step 4: Simplify right side
    1,377.76x = 2,437,469.13
  5. Step 5: Solve for x
    x = 2,437,469.13/1,377.76
  6. Step 6: Final answer
    x = 1,769.15

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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.