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Finding the Fourth Proportional to 538.58, 743.22 and 317.48

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Solution

The fourth proportional to 538.58, 743.22 and 317.48 is: 438.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.58 : 743.22 = 317.48 : x
  2. Step 2: Convert to fraction form
    538.58/743.22 = 317.48/x
  3. Step 3: Cross multiply
    538.58x = 743.22 × 317.48
  4. Step 4: Simplify right side
    538.58x = 235,953.77
  5. Step 5: Solve for x
    x = 235,953.77/538.58
  6. Step 6: Final answer
    x = 438.11

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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.