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Finding the Fourth Proportional to 416.99, 574.74 and 285.77

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Solution

The fourth proportional to 416.99, 574.74 and 285.77 is: 393.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.99 : 574.74 = 285.77 : x
  2. Step 2: Convert to fraction form
    416.99/574.74 = 285.77/x
  3. Step 3: Cross multiply
    416.99x = 574.74 × 285.77
  4. Step 4: Simplify right side
    416.99x = 164,244.89
  5. Step 5: Solve for x
    x = 164,244.89/416.99
  6. Step 6: Final answer
    x = 393.88

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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.