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Finding the Fourth Proportional to 486.36, 671.17 and 265.31

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Solution

The fourth proportional to 486.36, 671.17 and 265.31 is: 366.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.36 : 671.17 = 265.31 : x
  2. Step 2: Convert to fraction form
    486.36/671.17 = 265.31/x
  3. Step 3: Cross multiply
    486.36x = 671.17 × 265.31
  4. Step 4: Simplify right side
    486.36x = 178,064.76
  5. Step 5: Solve for x
    x = 178,064.76/486.36
  6. Step 6: Final answer
    x = 366.12

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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.