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Finding the Fourth Proportional to 416.34, 574.62 and 397.89

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Solution

The fourth proportional to 416.34, 574.62 and 397.89 is: 549.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.34 : 574.62 = 397.89 : x
  2. Step 2: Convert to fraction form
    416.34/574.62 = 397.89/x
  3. Step 3: Cross multiply
    416.34x = 574.62 × 397.89
  4. Step 4: Simplify right side
    416.34x = 228,635.83
  5. Step 5: Solve for x
    x = 228,635.83/416.34
  6. Step 6: Final answer
    x = 549.15

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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.