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Finding the Fourth Proportional to 1,724.70, 2,587.89 and 847.74

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Solution

The fourth proportional to 1,724.70, 2,587.89 and 847.74 is: 1,272.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.70 : 2,587.89 = 847.74 : x
  2. Step 2: Convert to fraction form
    1,724.70/2,587.89 = 847.74/x
  3. Step 3: Cross multiply
    1,724.70x = 2,587.89 × 847.74
  4. Step 4: Simplify right side
    1,724.70x = 2,193,857.87
  5. Step 5: Solve for x
    x = 2,193,857.87/1,724.70
  6. Step 6: Final answer
    x = 1,272.02

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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.