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Finding the Fourth Proportional to 558.62, 836.56 and 393.68

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Solution

The fourth proportional to 558.62, 836.56 and 393.68 is: 589.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.62 : 836.56 = 393.68 : x
  2. Step 2: Convert to fraction form
    558.62/836.56 = 393.68/x
  3. Step 3: Cross multiply
    558.62x = 836.56 × 393.68
  4. Step 4: Simplify right side
    558.62x = 329,339.03
  5. Step 5: Solve for x
    x = 329,339.03/558.62
  6. Step 6: Final answer
    x = 589.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.