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Finding the Fourth Proportional to 538.32, 807.24 and 213.60

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Solution

The fourth proportional to 538.32, 807.24 and 213.60 is: 320.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.32 : 807.24 = 213.60 : x
  2. Step 2: Convert to fraction form
    538.32/807.24 = 213.60/x
  3. Step 3: Cross multiply
    538.32x = 807.24 × 213.60
  4. Step 4: Simplify right side
    538.32x = 172,426.46
  5. Step 5: Solve for x
    x = 172,426.46/538.32
  6. Step 6: Final answer
    x = 320.30

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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.