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Finding the Fourth Proportional to 1,777.92, 2,667.12 and 1,257.88

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Solution

The fourth proportional to 1,777.92, 2,667.12 and 1,257.88 is: 1,886.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777.92 : 2,667.12 = 1,257.88 : x
  2. Step 2: Convert to fraction form
    1,777.92/2,667.12 = 1,257.88/x
  3. Step 3: Cross multiply
    1,777.92x = 2,667.12 × 1,257.88
  4. Step 4: Simplify right side
    1,777.92x = 3,354,916.91
  5. Step 5: Solve for x
    x = 3,354,916.91/1,777.92
  6. Step 6: Final answer
    x = 1,886.99

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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.