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Finding the Fourth Proportional to 609.87, 915.38 and 336.54

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Solution

The fourth proportional to 609.87, 915.38 and 336.54 is: 505.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.87 : 915.38 = 336.54 : x
  2. Step 2: Convert to fraction form
    609.87/915.38 = 336.54/x
  3. Step 3: Cross multiply
    609.87x = 915.38 × 336.54
  4. Step 4: Simplify right side
    609.87x = 308,061.99
  5. Step 5: Solve for x
    x = 308,061.99/609.87
  6. Step 6: Final answer
    x = 505.13

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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.