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Finding the Fourth Proportional to 1,105.80, 1,659.54 and 529.08

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Solution

The fourth proportional to 1,105.80, 1,659.54 and 529.08 is: 794.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.80 : 1,659.54 = 529.08 : x
  2. Step 2: Convert to fraction form
    1,105.80/1,659.54 = 529.08/x
  3. Step 3: Cross multiply
    1,105.80x = 1,659.54 × 529.08
  4. Step 4: Simplify right side
    1,105.80x = 878,029.42
  5. Step 5: Solve for x
    x = 878,029.42/1,105.80
  6. Step 6: Final answer
    x = 794.02

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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.