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Finding the Fourth Proportional to 509.39, 764.48 and 235.68

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Solution

The fourth proportional to 509.39, 764.48 and 235.68 is: 353.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.39 : 764.48 = 235.68 : x
  2. Step 2: Convert to fraction form
    509.39/764.48 = 235.68/x
  3. Step 3: Cross multiply
    509.39x = 764.48 × 235.68
  4. Step 4: Simplify right side
    509.39x = 180,172.65
  5. Step 5: Solve for x
    x = 180,172.65/509.39
  6. Step 6: Final answer
    x = 353.70

Related Problems

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Half scale
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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.