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Finding the Fourth Proportional to 538.03, 742.69 and 316.99

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Solution

The fourth proportional to 538.03, 742.69 and 316.99 is: 437.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.03 : 742.69 = 316.99 : x
  2. Step 2: Convert to fraction form
    538.03/742.69 = 316.99/x
  3. Step 3: Cross multiply
    538.03x = 742.69 × 316.99
  4. Step 4: Simplify right side
    538.03x = 235,425.30
  5. Step 5: Solve for x
    x = 235,425.30/538.03
  6. Step 6: Final answer
    x = 437.57

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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.