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Finding the Fourth Proportional to 610.60, 915.80 and 199.66

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Solution

The fourth proportional to 610.60, 915.80 and 199.66 is: 299.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.60 : 915.80 = 199.66 : x
  2. Step 2: Convert to fraction form
    610.60/915.80 = 199.66/x
  3. Step 3: Cross multiply
    610.60x = 915.80 × 199.66
  4. Step 4: Simplify right side
    610.60x = 182,848.63
  5. Step 5: Solve for x
    x = 182,848.63/610.60
  6. Step 6: Final answer
    x = 299.46

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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.