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Finding the Fourth Proportional to 3,718.52, 5,129.88 and 2,391.74

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Solution

The fourth proportional to 3,718.52, 5,129.88 and 2,391.74 is: 3,299.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,718.52 : 5,129.88 = 2,391.74 : x
  2. Step 2: Convert to fraction form
    3,718.52/5,129.88 = 2,391.74/x
  3. Step 3: Cross multiply
    3,718.52x = 5,129.88 × 2,391.74
  4. Step 4: Simplify right side
    3,718.52x = 12,269,339.19
  5. Step 5: Solve for x
    x = 12,269,339.19/3,718.52
  6. Step 6: Final answer
    x = 3,299.52

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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.