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Finding the Fourth Proportional to 507.98, 761.82 and 142.68

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Solution

The fourth proportional to 507.98, 761.82 and 142.68 is: 213.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.98 : 761.82 = 142.68 : x
  2. Step 2: Convert to fraction form
    507.98/761.82 = 142.68/x
  3. Step 3: Cross multiply
    507.98x = 761.82 × 142.68
  4. Step 4: Simplify right side
    507.98x = 108,696.48
  5. Step 5: Solve for x
    x = 108,696.48/507.98
  6. Step 6: Final answer
    x = 213.98

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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.