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Finding the Fourth Proportional to 2,508.76, 3,454 and 2,153.98

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Solution

The fourth proportional to 2,508.76, 3,454 and 2,153.98 is: 2,965.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,508.76 : 3,454 = 2,153.98 : x
  2. Step 2: Convert to fraction form
    2,508.76/3,454 = 2,153.98/x
  3. Step 3: Cross multiply
    2,508.76x = 3,454 × 2,153.98
  4. Step 4: Simplify right side
    2,508.76x = 7,439,846.92
  5. Step 5: Solve for x
    x = 7,439,846.92/2,508.76
  6. Step 6: Final answer
    x = 2,965.55

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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.