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Finding the Fourth Proportional to 574.49, 793.10 and 388.95

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Solution

The fourth proportional to 574.49, 793.10 and 388.95 is: 536.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.49 : 793.10 = 388.95 : x
  2. Step 2: Convert to fraction form
    574.49/793.10 = 388.95/x
  3. Step 3: Cross multiply
    574.49x = 793.10 × 388.95
  4. Step 4: Simplify right side
    574.49x = 308,474.30
  5. Step 5: Solve for x
    x = 308,474.30/574.49
  6. Step 6: Final answer
    x = 536.96

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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.