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Finding the Fourth Proportional to 609.74, 915.18 and 335.45

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Solution

The fourth proportional to 609.74, 915.18 and 335.45 is: 503.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.74 : 915.18 = 335.45 : x
  2. Step 2: Convert to fraction form
    609.74/915.18 = 335.45/x
  3. Step 3: Cross multiply
    609.74x = 915.18 × 335.45
  4. Step 4: Simplify right side
    609.74x = 306,997.13
  5. Step 5: Solve for x
    x = 306,997.13/609.74
  6. Step 6: Final answer
    x = 503.49

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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.