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Finding the Fourth Proportional to 2,187.36, 3,278.52 and 954

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Solution

The fourth proportional to 2,187.36, 3,278.52 and 954 is: 1,429.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.36 : 3,278.52 = 954 : x
  2. Step 2: Convert to fraction form
    2,187.36/3,278.52 = 954/x
  3. Step 3: Cross multiply
    2,187.36x = 3,278.52 × 954
  4. Step 4: Simplify right side
    2,187.36x = 3,127,708.08
  5. Step 5: Solve for x
    x = 3,127,708.08/2,187.36
  6. Step 6: Final answer
    x = 1,429.90

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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.