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Finding the Fourth Proportional to 469.81, 704.71 and 213.13

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Solution

The fourth proportional to 469.81, 704.71 and 213.13 is: 319.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.81 : 704.71 = 213.13 : x
  2. Step 2: Convert to fraction form
    469.81/704.71 = 213.13/x
  3. Step 3: Cross multiply
    469.81x = 704.71 × 213.13
  4. Step 4: Simplify right side
    469.81x = 150,191.32
  5. Step 5: Solve for x
    x = 150,191.32/469.81
  6. Step 6: Final answer
    x = 319.69

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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.