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Finding the Fourth Proportional to 2,174.52, 3,000.80 and 1,243

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Solution

The fourth proportional to 2,174.52, 3,000.80 and 1,243 is: 1,715.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.52 : 3,000.80 = 1,243 : x
  2. Step 2: Convert to fraction form
    2,174.52/3,000.80 = 1,243/x
  3. Step 3: Cross multiply
    2,174.52x = 3,000.80 × 1,243
  4. Step 4: Simplify right side
    2,174.52x = 3,729,994.40
  5. Step 5: Solve for x
    x = 3,729,994.40/2,174.52
  6. Step 6: Final answer
    x = 1,715.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.