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Finding the Fourth Proportional to 1,693.13, 2,540.10 and 538.88

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Solution

The fourth proportional to 1,693.13, 2,540.10 and 538.88 is: 808.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,693.13 : 2,540.10 = 538.88 : x
  2. Step 2: Convert to fraction form
    1,693.13/2,540.10 = 538.88/x
  3. Step 3: Cross multiply
    1,693.13x = 2,540.10 × 538.88
  4. Step 4: Simplify right side
    1,693.13x = 1,368,796.39
  5. Step 5: Solve for x
    x = 1,368,796.39/1,693.13
  6. Step 6: Final answer
    x = 808.44

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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.