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Finding the Fourth Proportional to 339.48, 468.12 and 287.08

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Solution

The fourth proportional to 339.48, 468.12 and 287.08 is: 395.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.48 : 468.12 = 287.08 : x
  2. Step 2: Convert to fraction form
    339.48/468.12 = 287.08/x
  3. Step 3: Cross multiply
    339.48x = 468.12 × 287.08
  4. Step 4: Simplify right side
    339.48x = 134,387.89
  5. Step 5: Solve for x
    x = 134,387.89/339.48
  6. Step 6: Final answer
    x = 395.86

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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.