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Finding the Fourth Proportional to 1,149.07, 1,722.04 and 839.47

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Solution

The fourth proportional to 1,149.07, 1,722.04 and 839.47 is: 1,258.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.07 : 1,722.04 = 839.47 : x
  2. Step 2: Convert to fraction form
    1,149.07/1,722.04 = 839.47/x
  3. Step 3: Cross multiply
    1,149.07x = 1,722.04 × 839.47
  4. Step 4: Simplify right side
    1,149.07x = 1,445,600.92
  5. Step 5: Solve for x
    x = 1,445,600.92/1,149.07
  6. Step 6: Final answer
    x = 1,258.06

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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.