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Finding the Fourth Proportional to 538.09, 742.66 and 317.03

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Solution

The fourth proportional to 538.09, 742.66 and 317.03 is: 437.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.09 : 742.66 = 317.03 : x
  2. Step 2: Convert to fraction form
    538.09/742.66 = 317.03/x
  3. Step 3: Cross multiply
    538.09x = 742.66 × 317.03
  4. Step 4: Simplify right side
    538.09x = 235,440.99
  5. Step 5: Solve for x
    x = 235,440.99/538.09
  6. Step 6: Final answer
    x = 437.55

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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.