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Finding the Fourth Proportional to 507.20, 760.78 and 141.98

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Solution

The fourth proportional to 507.20, 760.78 and 141.98 is: 212.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.20 : 760.78 = 141.98 : x
  2. Step 2: Convert to fraction form
    507.20/760.78 = 141.98/x
  3. Step 3: Cross multiply
    507.20x = 760.78 × 141.98
  4. Step 4: Simplify right side
    507.20x = 108,015.54
  5. Step 5: Solve for x
    x = 108,015.54/507.20
  6. Step 6: Final answer
    x = 212.96

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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.