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Finding the Fourth Proportional to 1,257.14, 1,881.32 and 994.83

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Solution

The fourth proportional to 1,257.14, 1,881.32 and 994.83 is: 1,488.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.14 : 1,881.32 = 994.83 : x
  2. Step 2: Convert to fraction form
    1,257.14/1,881.32 = 994.83/x
  3. Step 3: Cross multiply
    1,257.14x = 1,881.32 × 994.83
  4. Step 4: Simplify right side
    1,257.14x = 1,871,588.60
  5. Step 5: Solve for x
    x = 1,871,588.60/1,257.14
  6. Step 6: Final answer
    x = 1,488.77

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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.