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Finding the Fourth Proportional to 1,231.39, 1,847.01 and 677.16

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Solution

The fourth proportional to 1,231.39, 1,847.01 and 677.16 is: 1,015.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.39 : 1,847.01 = 677.16 : x
  2. Step 2: Convert to fraction form
    1,231.39/1,847.01 = 677.16/x
  3. Step 3: Cross multiply
    1,231.39x = 1,847.01 × 677.16
  4. Step 4: Simplify right side
    1,231.39x = 1,250,712.06
  5. Step 5: Solve for x
    x = 1,250,712.06/1,231.39
  6. Step 6: Final answer
    x = 1,015.70

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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.