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Finding the Fourth Proportional to 416.80, 626.10 and 356.66

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Solution

The fourth proportional to 416.80, 626.10 and 356.66 is: 535.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.80 : 626.10 = 356.66 : x
  2. Step 2: Convert to fraction form
    416.80/626.10 = 356.66/x
  3. Step 3: Cross multiply
    416.80x = 626.10 × 356.66
  4. Step 4: Simplify right side
    416.80x = 223,304.83
  5. Step 5: Solve for x
    x = 223,304.83/416.80
  6. Step 6: Final answer
    x = 535.76

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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.