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Finding the Fourth Proportional to 1,724.64, 2,587.05 and 684.54

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Solution

The fourth proportional to 1,724.64, 2,587.05 and 684.54 is: 1,026.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.64 : 2,587.05 = 684.54 : x
  2. Step 2: Convert to fraction form
    1,724.64/2,587.05 = 684.54/x
  3. Step 3: Cross multiply
    1,724.64x = 2,587.05 × 684.54
  4. Step 4: Simplify right side
    1,724.64x = 1,770,939.21
  5. Step 5: Solve for x
    x = 1,770,939.21/1,724.64
  6. Step 6: Final answer
    x = 1,026.85

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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.