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Finding the Fourth Proportional to 485, 727.36 and 160.28

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Solution

The fourth proportional to 485, 727.36 and 160.28 is: 240.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    485 : 727.36 = 160.28 : x
  2. Step 2: Convert to fraction form
    485/727.36 = 160.28/x
  3. Step 3: Cross multiply
    485x = 727.36 × 160.28
  4. Step 4: Simplify right side
    485x = 116,581.26
  5. Step 5: Solve for x
    x = 116,581.26/485
  6. Step 6: Final answer
    x = 240.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.