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Finding the Fourth Proportional to 1,199.80, 1,797 and 614.98

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Solution

The fourth proportional to 1,199.80, 1,797 and 614.98 is: 921.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.80 : 1,797 = 614.98 : x
  2. Step 2: Convert to fraction form
    1,199.80/1,797 = 614.98/x
  3. Step 3: Cross multiply
    1,199.80x = 1,797 × 614.98
  4. Step 4: Simplify right side
    1,199.80x = 1,105,119.06
  5. Step 5: Solve for x
    x = 1,105,119.06/1,199.80
  6. Step 6: Final answer
    x = 921.09

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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.