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Finding the Fourth Proportional to 2,257.68, 3,115.68 and 1,263.08

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Solution

The fourth proportional to 2,257.68, 3,115.68 and 1,263.08 is: 1,743.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,257.68 : 3,115.68 = 1,263.08 : x
  2. Step 2: Convert to fraction form
    2,257.68/3,115.68 = 1,263.08/x
  3. Step 3: Cross multiply
    2,257.68x = 3,115.68 × 1,263.08
  4. Step 4: Simplify right side
    2,257.68x = 3,935,353.09
  5. Step 5: Solve for x
    x = 3,935,353.09/2,257.68
  6. Step 6: Final answer
    x = 1,743.10

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1.5x scale

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.