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Finding the Fourth Proportional to 3,635.72, 5,017.32 and 1,979.72

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Solution

The fourth proportional to 3,635.72, 5,017.32 and 1,979.72 is: 2,732.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,635.72 : 5,017.32 = 1,979.72 : x
  2. Step 2: Convert to fraction form
    3,635.72/5,017.32 = 1,979.72/x
  3. Step 3: Cross multiply
    3,635.72x = 5,017.32 × 1,979.72
  4. Step 4: Simplify right side
    3,635.72x = 9,932,888.75
  5. Step 5: Solve for x
    x = 9,932,888.75/3,635.72
  6. Step 6: Final answer
    x = 2,732.03

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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.