Home / 1,251.81-1,868.76-1,087.83

Finding the Fourth Proportional to 1,251.81, 1,868.76 and 1,087.83

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Solution

The fourth proportional to 1,251.81, 1,868.76 and 1,087.83 is: 1,623.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.81 : 1,868.76 = 1,087.83 : x
  2. Step 2: Convert to fraction form
    1,251.81/1,868.76 = 1,087.83/x
  3. Step 3: Cross multiply
    1,251.81x = 1,868.76 × 1,087.83
  4. Step 4: Simplify right side
    1,251.81x = 2,032,893.19
  5. Step 5: Solve for x
    x = 2,032,893.19/1,251.81
  6. Step 6: Final answer
    x = 1,623.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.