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Finding the Fourth Proportional to 509.49, 764.37 and 216.99

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Solution

The fourth proportional to 509.49, 764.37 and 216.99 is: 325.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.49 : 764.37 = 216.99 : x
  2. Step 2: Convert to fraction form
    509.49/764.37 = 216.99/x
  3. Step 3: Cross multiply
    509.49x = 764.37 × 216.99
  4. Step 4: Simplify right side
    509.49x = 165,860.65
  5. Step 5: Solve for x
    x = 165,860.65/509.49
  6. Step 6: Final answer
    x = 325.54

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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.