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Finding the Fourth Proportional to 509.55, 764.18 and 235.77

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Solution

The fourth proportional to 509.55, 764.18 and 235.77 is: 353.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.55 : 764.18 = 235.77 : x
  2. Step 2: Convert to fraction form
    509.55/764.18 = 235.77/x
  3. Step 3: Cross multiply
    509.55x = 764.18 × 235.77
  4. Step 4: Simplify right side
    509.55x = 180,170.72
  5. Step 5: Solve for x
    x = 180,170.72/509.55
  6. Step 6: Final answer
    x = 353.59

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Double scale
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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.