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Finding the Fourth Proportional to 393.38, 592.36 and 291.38

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Solution

The fourth proportional to 393.38, 592.36 and 291.38 is: 438.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.38 : 592.36 = 291.38 : x
  2. Step 2: Convert to fraction form
    393.38/592.36 = 291.38/x
  3. Step 3: Cross multiply
    393.38x = 592.36 × 291.38
  4. Step 4: Simplify right side
    393.38x = 172,601.86
  5. Step 5: Solve for x
    x = 172,601.86/393.38
  6. Step 6: Final answer
    x = 438.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.