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Finding the Fourth Proportional to 610.70, 916.15 and 199.74

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Solution

The fourth proportional to 610.70, 916.15 and 199.74 is: 299.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.70 : 916.15 = 199.74 : x
  2. Step 2: Convert to fraction form
    610.70/916.15 = 199.74/x
  3. Step 3: Cross multiply
    610.70x = 916.15 × 199.74
  4. Step 4: Simplify right side
    610.70x = 182,991.80
  5. Step 5: Solve for x
    x = 182,991.80/610.70
  6. Step 6: Final answer
    x = 299.64

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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.