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Finding the Fourth Proportional to 457.00, 685.01 and 213.32

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Solution

The fourth proportional to 457.00, 685.01 and 213.32 is: 319.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.00 : 685.01 = 213.32 : x
  2. Step 2: Convert to fraction form
    457.00/685.01 = 213.32/x
  3. Step 3: Cross multiply
    457.00x = 685.01 × 213.32
  4. Step 4: Simplify right side
    457.00x = 146,128.58
  5. Step 5: Solve for x
    x = 146,128.58/457.00
  6. Step 6: Final answer
    x = 319.76

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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.