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Finding the Fourth Proportional to 610.49, 915.78 and 199.62

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Solution

The fourth proportional to 610.49, 915.78 and 199.62 is: 299.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.49 : 915.78 = 199.62 : x
  2. Step 2: Convert to fraction form
    610.49/915.78 = 199.62/x
  3. Step 3: Cross multiply
    610.49x = 915.78 × 199.62
  4. Step 4: Simplify right side
    610.49x = 182,808.00
  5. Step 5: Solve for x
    x = 182,808.00/610.49
  6. Step 6: Final answer
    x = 299.45

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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.