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Finding the Fourth Proportional to 416.12, 574.16 and 285.17

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Solution

The fourth proportional to 416.12, 574.16 and 285.17 is: 393.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.12 : 574.16 = 285.17 : x
  2. Step 2: Convert to fraction form
    416.12/574.16 = 285.17/x
  3. Step 3: Cross multiply
    416.12x = 574.16 × 285.17
  4. Step 4: Simplify right side
    416.12x = 163,728.91
  5. Step 5: Solve for x
    x = 163,728.91/416.12
  6. Step 6: Final answer
    x = 393.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.