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Finding the Fourth Proportional to 574.65, 793.40 and 388.40

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Solution

The fourth proportional to 574.65, 793.40 and 388.40 is: 536.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.65 : 793.40 = 388.40 : x
  2. Step 2: Convert to fraction form
    574.65/793.40 = 388.40/x
  3. Step 3: Cross multiply
    574.65x = 793.40 × 388.40
  4. Step 4: Simplify right side
    574.65x = 308,150.65
  5. Step 5: Solve for x
    x = 308,150.65/574.65
  6. Step 6: Final answer
    x = 536.24

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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.