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Finding the Fourth Proportional to 509.93, 764.99 and 217.36

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Solution

The fourth proportional to 509.93, 764.99 and 217.36 is: 326.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.93 : 764.99 = 217.36 : x
  2. Step 2: Convert to fraction form
    509.93/764.99 = 217.36/x
  3. Step 3: Cross multiply
    509.93x = 764.99 × 217.36
  4. Step 4: Simplify right side
    509.93x = 166,278.23
  5. Step 5: Solve for x
    x = 166,278.23/509.93
  6. Step 6: Final answer
    x = 326.08

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Double scale
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Similar ratio
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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.