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Finding the Fourth Proportional to 605.57, 908.40 and 215.65

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Solution

The fourth proportional to 605.57, 908.40 and 215.65 is: 323.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.57 : 908.40 = 215.65 : x
  2. Step 2: Convert to fraction form
    605.57/908.40 = 215.65/x
  3. Step 3: Cross multiply
    605.57x = 908.40 × 215.65
  4. Step 4: Simplify right side
    605.57x = 195,895.38
  5. Step 5: Solve for x
    x = 195,895.38/605.57
  6. Step 6: Final answer
    x = 323.49

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1.5x scale

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.