Home / 1,781.34-2,458.11-984.66

Finding the Fourth Proportional to 1,781.34, 2,458.11 and 984.66

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Solution

The fourth proportional to 1,781.34, 2,458.11 and 984.66 is: 1,358.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.34 : 2,458.11 = 984.66 : x
  2. Step 2: Convert to fraction form
    1,781.34/2,458.11 = 984.66/x
  3. Step 3: Cross multiply
    1,781.34x = 2,458.11 × 984.66
  4. Step 4: Simplify right side
    1,781.34x = 2,420,397.07
  5. Step 5: Solve for x
    x = 2,420,397.07/1,781.34
  6. Step 6: Final answer
    x = 1,358.75

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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.