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Finding the Fourth Proportional to 509.71, 764.57 and 144.48

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Solution

The fourth proportional to 509.71, 764.57 and 144.48 is: 216.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.71 : 764.57 = 144.48 : x
  2. Step 2: Convert to fraction form
    509.71/764.57 = 144.48/x
  3. Step 3: Cross multiply
    509.71x = 764.57 × 144.48
  4. Step 4: Simplify right side
    509.71x = 110,464.35
  5. Step 5: Solve for x
    x = 110,464.35/509.71
  6. Step 6: Final answer
    x = 216.72

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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.