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Finding the Fourth Proportional to 3,745.92, 5,612.73 and 1,279.40

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Solution

The fourth proportional to 3,745.92, 5,612.73 and 1,279.40 is: 1,916.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,745.92 : 5,612.73 = 1,279.40 : x
  2. Step 2: Convert to fraction form
    3,745.92/5,612.73 = 1,279.40/x
  3. Step 3: Cross multiply
    3,745.92x = 5,612.73 × 1,279.40
  4. Step 4: Simplify right side
    3,745.92x = 7,180,899.30
  5. Step 5: Solve for x
    x = 7,180,899.30/3,745.92
  6. Step 6: Final answer
    x = 1,916.99

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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.