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Finding the Fourth Proportional to 416.40, 571.55 and 379.34

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Solution

The fourth proportional to 416.40, 571.55 and 379.34 is: 520.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.40 : 571.55 = 379.34 : x
  2. Step 2: Convert to fraction form
    416.40/571.55 = 379.34/x
  3. Step 3: Cross multiply
    416.40x = 571.55 × 379.34
  4. Step 4: Simplify right side
    416.40x = 216,811.78
  5. Step 5: Solve for x
    x = 216,811.78/416.40
  6. Step 6: Final answer
    x = 520.68

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.