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Finding the Fourth Proportional to 2,490.70, 3,455.80 and 2,469.51

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Solution

The fourth proportional to 2,490.70, 3,455.80 and 2,469.51 is: 3,426.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.70 : 3,455.80 = 2,469.51 : x
  2. Step 2: Convert to fraction form
    2,490.70/3,455.80 = 2,469.51/x
  3. Step 3: Cross multiply
    2,490.70x = 3,455.80 × 2,469.51
  4. Step 4: Simplify right side
    2,490.70x = 8,534,132.66
  5. Step 5: Solve for x
    x = 8,534,132.66/2,490.70
  6. Step 6: Final answer
    x = 3,426.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.