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Finding the Fourth Proportional to 436.28, 651.54 and 378.68

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Solution

The fourth proportional to 436.28, 651.54 and 378.68 is: 565.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.28 : 651.54 = 378.68 : x
  2. Step 2: Convert to fraction form
    436.28/651.54 = 378.68/x
  3. Step 3: Cross multiply
    436.28x = 651.54 × 378.68
  4. Step 4: Simplify right side
    436.28x = 246,723.33
  5. Step 5: Solve for x
    x = 246,723.33/436.28
  6. Step 6: Final answer
    x = 565.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.