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Finding the Fourth Proportional to 490.01, 734.94 and 124.78

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Solution

The fourth proportional to 490.01, 734.94 and 124.78 is: 187.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.01 : 734.94 = 124.78 : x
  2. Step 2: Convert to fraction form
    490.01/734.94 = 124.78/x
  3. Step 3: Cross multiply
    490.01x = 734.94 × 124.78
  4. Step 4: Simplify right side
    490.01x = 91,701.51
  5. Step 5: Solve for x
    x = 91,701.51/490.01
  6. Step 6: Final answer
    x = 187.14

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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.