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Finding the Fourth Proportional to 404.19, 558 and 256.86

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Solution

The fourth proportional to 404.19, 558 and 256.86 is: 354.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.19 : 558 = 256.86 : x
  2. Step 2: Convert to fraction form
    404.19/558 = 256.86/x
  3. Step 3: Cross multiply
    404.19x = 558 × 256.86
  4. Step 4: Simplify right side
    404.19x = 143,327.88
  5. Step 5: Solve for x
    x = 143,327.88/404.19
  6. Step 6: Final answer
    x = 354.61

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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.