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Finding the Fourth Proportional to 484.68, 726.98 and 138

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Solution

The fourth proportional to 484.68, 726.98 and 138 is: 206.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.68 : 726.98 = 138 : x
  2. Step 2: Convert to fraction form
    484.68/726.98 = 138/x
  3. Step 3: Cross multiply
    484.68x = 726.98 × 138
  4. Step 4: Simplify right side
    484.68x = 100,323.24
  5. Step 5: Solve for x
    x = 100,323.24/484.68
  6. Step 6: Final answer
    x = 206.99

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.