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Finding the Fourth Proportional to 213.61, 293.90 and 207.56

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Solution

The fourth proportional to 213.61, 293.90 and 207.56 is: 285.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.61 : 293.90 = 207.56 : x
  2. Step 2: Convert to fraction form
    213.61/293.90 = 207.56/x
  3. Step 3: Cross multiply
    213.61x = 293.90 × 207.56
  4. Step 4: Simplify right side
    213.61x = 61,003.33
  5. Step 5: Solve for x
    x = 61,003.33/213.61
  6. Step 6: Final answer
    x = 285.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.