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Finding the Fourth Proportional to 2,490.80, 3,439.80 and 2,053.04

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Solution

The fourth proportional to 2,490.80, 3,439.80 and 2,053.04 is: 2,835.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.80 : 3,439.80 = 2,053.04 : x
  2. Step 2: Convert to fraction form
    2,490.80/3,439.80 = 2,053.04/x
  3. Step 3: Cross multiply
    2,490.80x = 3,439.80 × 2,053.04
  4. Step 4: Simplify right side
    2,490.80x = 7,062,046.99
  5. Step 5: Solve for x
    x = 7,062,046.99/2,490.80
  6. Step 6: Final answer
    x = 2,835.25

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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.