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Finding the Fourth Proportional to 610.82, 916.36 and 199.88

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Solution

The fourth proportional to 610.82, 916.36 and 199.88 is: 299.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.82 : 916.36 = 199.88 : x
  2. Step 2: Convert to fraction form
    610.82/916.36 = 199.88/x
  3. Step 3: Cross multiply
    610.82x = 916.36 × 199.88
  4. Step 4: Simplify right side
    610.82x = 183,162.04
  5. Step 5: Solve for x
    x = 183,162.04/610.82
  6. Step 6: Final answer
    x = 299.86

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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.