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Finding the Fourth Proportional to 574.15, 792.33 and 312.17

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Solution

The fourth proportional to 574.15, 792.33 and 312.17 is: 430.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.15 : 792.33 = 312.17 : x
  2. Step 2: Convert to fraction form
    574.15/792.33 = 312.17/x
  3. Step 3: Cross multiply
    574.15x = 792.33 × 312.17
  4. Step 4: Simplify right side
    574.15x = 247,338.87
  5. Step 5: Solve for x
    x = 247,338.87/574.15
  6. Step 6: Final answer
    x = 430.79

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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.