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Finding the Fourth Proportional to 436.48, 653.16 and 385.44

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Solution

The fourth proportional to 436.48, 653.16 and 385.44 is: 576.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.48 : 653.16 = 385.44 : x
  2. Step 2: Convert to fraction form
    436.48/653.16 = 385.44/x
  3. Step 3: Cross multiply
    436.48x = 653.16 × 385.44
  4. Step 4: Simplify right side
    436.48x = 251,753.99
  5. Step 5: Solve for x
    x = 251,753.99/436.48
  6. Step 6: Final answer
    x = 576.78

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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.