Home / 1,686.39-2,327.85-1,247.82

Finding the Fourth Proportional to 1,686.39, 2,327.85 and 1,247.82

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Solution

The fourth proportional to 1,686.39, 2,327.85 and 1,247.82 is: 1,722.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.39 : 2,327.85 = 1,247.82 : x
  2. Step 2: Convert to fraction form
    1,686.39/2,327.85 = 1,247.82/x
  3. Step 3: Cross multiply
    1,686.39x = 2,327.85 × 1,247.82
  4. Step 4: Simplify right side
    1,686.39x = 2,904,737.79
  5. Step 5: Solve for x
    x = 2,904,737.79/1,686.39
  6. Step 6: Final answer
    x = 1,722.46

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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.