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Finding the Fourth Proportional to 1,753.56, 2,420.87 and 1,280.97

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Solution

The fourth proportional to 1,753.56, 2,420.87 and 1,280.97 is: 1,768.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,753.56 : 2,420.87 = 1,280.97 : x
  2. Step 2: Convert to fraction form
    1,753.56/2,420.87 = 1,280.97/x
  3. Step 3: Cross multiply
    1,753.56x = 2,420.87 × 1,280.97
  4. Step 4: Simplify right side
    1,753.56x = 3,101,055.44
  5. Step 5: Solve for x
    x = 3,101,055.44/1,753.56
  6. Step 6: Final answer
    x = 1,768.43

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1.5x scale

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.