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Finding the Fourth Proportional to 538.07, 807.30 and 213.66

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Solution

The fourth proportional to 538.07, 807.30 and 213.66 is: 320.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.07 : 807.30 = 213.66 : x
  2. Step 2: Convert to fraction form
    538.07/807.30 = 213.66/x
  3. Step 3: Cross multiply
    538.07x = 807.30 × 213.66
  4. Step 4: Simplify right side
    538.07x = 172,487.72
  5. Step 5: Solve for x
    x = 172,487.72/538.07
  6. Step 6: Final answer
    x = 320.57

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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.