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Finding the Fourth Proportional to 1,161.06, 1,742.40 and 832.20

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Solution

The fourth proportional to 1,161.06, 1,742.40 and 832.20 is: 1,248.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.06 : 1,742.40 = 832.20 : x
  2. Step 2: Convert to fraction form
    1,161.06/1,742.40 = 832.20/x
  3. Step 3: Cross multiply
    1,161.06x = 1,742.40 × 832.20
  4. Step 4: Simplify right side
    1,161.06x = 1,450,025.28
  5. Step 5: Solve for x
    x = 1,450,025.28/1,161.06
  6. Step 6: Final answer
    x = 1,248.88

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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.