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Finding the Fourth Proportional to 3,489.76, 5,235.42 and 1,180.72

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Solution

The fourth proportional to 3,489.76, 5,235.42 and 1,180.72 is: 1,771.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,489.76 : 5,235.42 = 1,180.72 : x
  2. Step 2: Convert to fraction form
    3,489.76/5,235.42 = 1,180.72/x
  3. Step 3: Cross multiply
    3,489.76x = 5,235.42 × 1,180.72
  4. Step 4: Simplify right side
    3,489.76x = 6,181,565.10
  5. Step 5: Solve for x
    x = 6,181,565.10/3,489.76
  6. Step 6: Final answer
    x = 1,771.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.