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Finding the Fourth Proportional to 494.81, 742.36 and 148.15

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Solution

The fourth proportional to 494.81, 742.36 and 148.15 is: 222.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.81 : 742.36 = 148.15 : x
  2. Step 2: Convert to fraction form
    494.81/742.36 = 148.15/x
  3. Step 3: Cross multiply
    494.81x = 742.36 × 148.15
  4. Step 4: Simplify right side
    494.81x = 109,980.63
  5. Step 5: Solve for x
    x = 109,980.63/494.81
  6. Step 6: Final answer
    x = 222.27

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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.