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Finding the Fourth Proportional to 3,952.74, 5,455.10 and 2,274.72

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Solution

The fourth proportional to 3,952.74, 5,455.10 and 2,274.72 is: 3,139.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,952.74 : 5,455.10 = 2,274.72 : x
  2. Step 2: Convert to fraction form
    3,952.74/5,455.10 = 2,274.72/x
  3. Step 3: Cross multiply
    3,952.74x = 5,455.10 × 2,274.72
  4. Step 4: Simplify right side
    3,952.74x = 12,408,825.07
  5. Step 5: Solve for x
    x = 12,408,825.07/3,952.74
  6. Step 6: Final answer
    x = 3,139.30

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Double scale
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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.