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Finding the Fourth Proportional to 419.13, 578.12 and 271.85

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Solution

The fourth proportional to 419.13, 578.12 and 271.85 is: 374.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.13 : 578.12 = 271.85 : x
  2. Step 2: Convert to fraction form
    419.13/578.12 = 271.85/x
  3. Step 3: Cross multiply
    419.13x = 578.12 × 271.85
  4. Step 4: Simplify right side
    419.13x = 157,157.67
  5. Step 5: Solve for x
    x = 157,157.67/419.13
  6. Step 6: Final answer
    x = 374.96

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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.