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Finding the Fourth Proportional to 591.05, 815.62 and 342.38

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Solution

The fourth proportional to 591.05, 815.62 and 342.38 is: 472.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.05 : 815.62 = 342.38 : x
  2. Step 2: Convert to fraction form
    591.05/815.62 = 342.38/x
  3. Step 3: Cross multiply
    591.05x = 815.62 × 342.38
  4. Step 4: Simplify right side
    591.05x = 279,249.21
  5. Step 5: Solve for x
    x = 279,249.21/591.05
  6. Step 6: Final answer
    x = 472.47

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Double scale
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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.