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Finding the Fourth Proportional to 574.48, 792.55 and 399.93

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Solution

The fourth proportional to 574.48, 792.55 and 399.93 is: 551.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.48 : 792.55 = 399.93 : x
  2. Step 2: Convert to fraction form
    574.48/792.55 = 399.93/x
  3. Step 3: Cross multiply
    574.48x = 792.55 × 399.93
  4. Step 4: Simplify right side
    574.48x = 316,964.52
  5. Step 5: Solve for x
    x = 316,964.52/574.48
  6. Step 6: Final answer
    x = 551.74

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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.