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Finding the Fourth Proportional to 509.69, 764.24 and 216.98

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Solution

The fourth proportional to 509.69, 764.24 and 216.98 is: 325.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.69 : 764.24 = 216.98 : x
  2. Step 2: Convert to fraction form
    509.69/764.24 = 216.98/x
  3. Step 3: Cross multiply
    509.69x = 764.24 × 216.98
  4. Step 4: Simplify right side
    509.69x = 165,822.76
  5. Step 5: Solve for x
    x = 165,822.76/509.69
  6. Step 6: Final answer
    x = 325.34

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Double scale
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Similar ratio
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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.