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Finding the Fourth Proportional to 3,739.80, 5,160.80 and 2,146.72

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Solution

The fourth proportional to 3,739.80, 5,160.80 and 2,146.72 is: 2,962.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,739.80 : 5,160.80 = 2,146.72 : x
  2. Step 2: Convert to fraction form
    3,739.80/5,160.80 = 2,146.72/x
  3. Step 3: Cross multiply
    3,739.80x = 5,160.80 × 2,146.72
  4. Step 4: Simplify right side
    3,739.80x = 11,078,792.58
  5. Step 5: Solve for x
    x = 11,078,792.58/3,739.80
  6. Step 6: Final answer
    x = 2,962.40

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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.