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Finding the Fourth Proportional to 378.65, 571.26 and 377.63

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Solution

The fourth proportional to 378.65, 571.26 and 377.63 is: 569.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.65 : 571.26 = 377.63 : x
  2. Step 2: Convert to fraction form
    378.65/571.26 = 377.63/x
  3. Step 3: Cross multiply
    378.65x = 571.26 × 377.63
  4. Step 4: Simplify right side
    378.65x = 215,724.93
  5. Step 5: Solve for x
    x = 215,724.93/378.65
  6. Step 6: Final answer
    x = 569.73

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.