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Finding the Fourth Proportional to 2,490.76, 3,736.62 and 759.64

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Solution

The fourth proportional to 2,490.76, 3,736.62 and 759.64 is: 1,139.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.76 : 3,736.62 = 759.64 : x
  2. Step 2: Convert to fraction form
    2,490.76/3,736.62 = 759.64/x
  3. Step 3: Cross multiply
    2,490.76x = 3,736.62 × 759.64
  4. Step 4: Simplify right side
    2,490.76x = 2,838,486.02
  5. Step 5: Solve for x
    x = 2,838,486.02/2,490.76
  6. Step 6: Final answer
    x = 1,139.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.