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Finding the Fourth Proportional to 418.75, 578.27 and 353.14

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Solution

The fourth proportional to 418.75, 578.27 and 353.14 is: 487.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.75 : 578.27 = 353.14 : x
  2. Step 2: Convert to fraction form
    418.75/578.27 = 353.14/x
  3. Step 3: Cross multiply
    418.75x = 578.27 × 353.14
  4. Step 4: Simplify right side
    418.75x = 204,210.27
  5. Step 5: Solve for x
    x = 204,210.27/418.75
  6. Step 6: Final answer
    x = 487.67

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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.