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Finding the Fourth Proportional to 486.67, 671.25 and 339.35

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Solution

The fourth proportional to 486.67, 671.25 and 339.35 is: 468.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.67 : 671.25 = 339.35 : x
  2. Step 2: Convert to fraction form
    486.67/671.25 = 339.35/x
  3. Step 3: Cross multiply
    486.67x = 671.25 × 339.35
  4. Step 4: Simplify right side
    486.67x = 227,788.69
  5. Step 5: Solve for x
    x = 227,788.69/486.67
  6. Step 6: Final answer
    x = 468.06

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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.