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Finding the Fourth Proportional to 605.98, 909.20 and 317.22

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Solution

The fourth proportional to 605.98, 909.20 and 317.22 is: 475.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.98 : 909.20 = 317.22 : x
  2. Step 2: Convert to fraction form
    605.98/909.20 = 317.22/x
  3. Step 3: Cross multiply
    605.98x = 909.20 × 317.22
  4. Step 4: Simplify right side
    605.98x = 288,410.29
  5. Step 5: Solve for x
    x = 288,410.29/605.98
  6. Step 6: Final answer
    x = 475.94

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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.