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Finding the Fourth Proportional to 3,720.80, 5,137.08 and 2,932.40

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Solution

The fourth proportional to 3,720.80, 5,137.08 and 2,932.40 is: 4,048.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.80 : 5,137.08 = 2,932.40 : x
  2. Step 2: Convert to fraction form
    3,720.80/5,137.08 = 2,932.40/x
  3. Step 3: Cross multiply
    3,720.80x = 5,137.08 × 2,932.40
  4. Step 4: Simplify right side
    3,720.80x = 15,063,973.39
  5. Step 5: Solve for x
    x = 15,063,973.39/3,720.80
  6. Step 6: Final answer
    x = 4,048.58

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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.