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Finding the Fourth Proportional to 1,299.80, 1,946.46 and 1,228.52

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Solution

The fourth proportional to 1,299.80, 1,946.46 and 1,228.52 is: 1,839.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.80 : 1,946.46 = 1,228.52 : x
  2. Step 2: Convert to fraction form
    1,299.80/1,946.46 = 1,228.52/x
  3. Step 3: Cross multiply
    1,299.80x = 1,946.46 × 1,228.52
  4. Step 4: Simplify right side
    1,299.80x = 2,391,265.04
  5. Step 5: Solve for x
    x = 2,391,265.04/1,299.80
  6. Step 6: Final answer
    x = 1,839.72

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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.