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Finding the Fourth Proportional to 509.90, 764.84 and 201.79

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Solution

The fourth proportional to 509.90, 764.84 and 201.79 is: 302.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.90 : 764.84 = 201.79 : x
  2. Step 2: Convert to fraction form
    509.90/764.84 = 201.79/x
  3. Step 3: Cross multiply
    509.90x = 764.84 × 201.79
  4. Step 4: Simplify right side
    509.90x = 154,338.52
  5. Step 5: Solve for x
    x = 154,338.52/509.90
  6. Step 6: Final answer
    x = 302.69

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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.