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Finding the Fourth Proportional to 495.39, 743.12 and 148.72

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Solution

The fourth proportional to 495.39, 743.12 and 148.72 is: 223.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.39 : 743.12 = 148.72 : x
  2. Step 2: Convert to fraction form
    495.39/743.12 = 148.72/x
  3. Step 3: Cross multiply
    495.39x = 743.12 × 148.72
  4. Step 4: Simplify right side
    495.39x = 110,516.81
  5. Step 5: Solve for x
    x = 110,516.81/495.39
  6. Step 6: Final answer
    x = 223.09

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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.