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Finding the Fourth Proportional to 404.78, 558.59 and 230.12

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Solution

The fourth proportional to 404.78, 558.59 and 230.12 is: 317.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.78 : 558.59 = 230.12 : x
  2. Step 2: Convert to fraction form
    404.78/558.59 = 230.12/x
  3. Step 3: Cross multiply
    404.78x = 558.59 × 230.12
  4. Step 4: Simplify right side
    404.78x = 128,538.79
  5. Step 5: Solve for x
    x = 128,538.79/404.78
  6. Step 6: Final answer
    x = 317.56

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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.