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Finding the Fourth Proportional to 609.99, 915.76 and 488.11

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Solution

The fourth proportional to 609.99, 915.76 and 488.11 is: 732.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.99 : 915.76 = 488.11 : x
  2. Step 2: Convert to fraction form
    609.99/915.76 = 488.11/x
  3. Step 3: Cross multiply
    609.99x = 915.76 × 488.11
  4. Step 4: Simplify right side
    609.99x = 446,991.61
  5. Step 5: Solve for x
    x = 446,991.61/609.99
  6. Step 6: Final answer
    x = 732.79

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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.