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Finding the Fourth Proportional to 1,754.10, 2,420.28 and 997.92

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Solution

The fourth proportional to 1,754.10, 2,420.28 and 997.92 is: 1,376.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,754.10 : 2,420.28 = 997.92 : x
  2. Step 2: Convert to fraction form
    1,754.10/2,420.28 = 997.92/x
  3. Step 3: Cross multiply
    1,754.10x = 2,420.28 × 997.92
  4. Step 4: Simplify right side
    1,754.10x = 2,415,245.82
  5. Step 5: Solve for x
    x = 2,415,245.82/1,754.10
  6. Step 6: Final answer
    x = 1,376.91

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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.