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Finding the Fourth Proportional to 610.49, 915.84 and 199.64

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Solution

The fourth proportional to 610.49, 915.84 and 199.64 is: 299.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.49 : 915.84 = 199.64 : x
  2. Step 2: Convert to fraction form
    610.49/915.84 = 199.64/x
  3. Step 3: Cross multiply
    610.49x = 915.84 × 199.64
  4. Step 4: Simplify right side
    610.49x = 182,842.30
  5. Step 5: Solve for x
    x = 182,842.30/610.49
  6. Step 6: Final answer
    x = 299.50

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1.5x scale

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.