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Finding the Fourth Proportional to 507.55, 760.71 and 218.38

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Solution

The fourth proportional to 507.55, 760.71 and 218.38 is: 327.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.55 : 760.71 = 218.38 : x
  2. Step 2: Convert to fraction form
    507.55/760.71 = 218.38/x
  3. Step 3: Cross multiply
    507.55x = 760.71 × 218.38
  4. Step 4: Simplify right side
    507.55x = 166,120.05
  5. Step 5: Solve for x
    x = 166,120.05/507.55
  6. Step 6: Final answer
    x = 327.30

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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.