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Finding the Fourth Proportional to 609.28, 915.36 and 561.76

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Solution

The fourth proportional to 609.28, 915.36 and 561.76 is: 843.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.28 : 915.36 = 561.76 : x
  2. Step 2: Convert to fraction form
    609.28/915.36 = 561.76/x
  3. Step 3: Cross multiply
    609.28x = 915.36 × 561.76
  4. Step 4: Simplify right side
    609.28x = 514,212.63
  5. Step 5: Solve for x
    x = 514,212.63/609.28
  6. Step 6: Final answer
    x = 843.97

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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.