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Finding the Fourth Proportional to 467.21, 700.72 and 138.08

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Solution

The fourth proportional to 467.21, 700.72 and 138.08 is: 207.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.21 : 700.72 = 138.08 : x
  2. Step 2: Convert to fraction form
    467.21/700.72 = 138.08/x
  3. Step 3: Cross multiply
    467.21x = 700.72 × 138.08
  4. Step 4: Simplify right side
    467.21x = 96,751.91
  5. Step 5: Solve for x
    x = 96,751.91/467.21
  6. Step 6: Final answer
    x = 207.09

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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.