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Finding the Fourth Proportional to 416.34, 574.47 and 285.30

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Solution

The fourth proportional to 416.34, 574.47 and 285.30 is: 393.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.34 : 574.47 = 285.30 : x
  2. Step 2: Convert to fraction form
    416.34/574.47 = 285.30/x
  3. Step 3: Cross multiply
    416.34x = 574.47 × 285.30
  4. Step 4: Simplify right side
    416.34x = 163,896.29
  5. Step 5: Solve for x
    x = 163,896.29/416.34
  6. Step 6: Final answer
    x = 393.66

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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.