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Finding the Fourth Proportional to 1,161.04, 1,739.85 and 851.45

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Solution

The fourth proportional to 1,161.04, 1,739.85 and 851.45 is: 1,275.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.04 : 1,739.85 = 851.45 : x
  2. Step 2: Convert to fraction form
    1,161.04/1,739.85 = 851.45/x
  3. Step 3: Cross multiply
    1,161.04x = 1,739.85 × 851.45
  4. Step 4: Simplify right side
    1,161.04x = 1,481,395.28
  5. Step 5: Solve for x
    x = 1,481,395.28/1,161.04
  6. Step 6: Final answer
    x = 1,275.92

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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.