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Finding the Fourth Proportional to 339.07, 467.94 and 317.20

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Solution

The fourth proportional to 339.07, 467.94 and 317.20 is: 437.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.07 : 467.94 = 317.20 : x
  2. Step 2: Convert to fraction form
    339.07/467.94 = 317.20/x
  3. Step 3: Cross multiply
    339.07x = 467.94 × 317.20
  4. Step 4: Simplify right side
    339.07x = 148,430.57
  5. Step 5: Solve for x
    x = 148,430.57/339.07
  6. Step 6: Final answer
    x = 437.76

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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.