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Finding the Fourth Proportional to 1,119.83, 1,546.07 and 824.58

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Solution

The fourth proportional to 1,119.83, 1,546.07 and 824.58 is: 1,138.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.83 : 1,546.07 = 824.58 : x
  2. Step 2: Convert to fraction form
    1,119.83/1,546.07 = 824.58/x
  3. Step 3: Cross multiply
    1,119.83x = 1,546.07 × 824.58
  4. Step 4: Simplify right side
    1,119.83x = 1,274,854.28
  5. Step 5: Solve for x
    x = 1,274,854.28/1,119.83
  6. Step 6: Final answer
    x = 1,138.44

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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.