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Finding the Fourth Proportional to 1,253.70, 1,881.27 and 979.02

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Solution

The fourth proportional to 1,253.70, 1,881.27 and 979.02 is: 1,469.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.70 : 1,881.27 = 979.02 : x
  2. Step 2: Convert to fraction form
    1,253.70/1,881.27 = 979.02/x
  3. Step 3: Cross multiply
    1,253.70x = 1,881.27 × 979.02
  4. Step 4: Simplify right side
    1,253.70x = 1,841,800.96
  5. Step 5: Solve for x
    x = 1,841,800.96/1,253.70
  6. Step 6: Final answer
    x = 1,469.09

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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.