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Finding the Fourth Proportional to 509.42, 764.25 and 290.29

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Solution

The fourth proportional to 509.42, 764.25 and 290.29 is: 435.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.42 : 764.25 = 290.29 : x
  2. Step 2: Convert to fraction form
    509.42/764.25 = 290.29/x
  3. Step 3: Cross multiply
    509.42x = 764.25 × 290.29
  4. Step 4: Simplify right side
    509.42x = 221,855.35
  5. Step 5: Solve for x
    x = 221,855.35/509.42
  6. Step 6: Final answer
    x = 435.51

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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.