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Finding the Fourth Proportional to 485.87, 727.67 and 355.54

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Solution

The fourth proportional to 485.87, 727.67 and 355.54 is: 532.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.87 : 727.67 = 355.54 : x
  2. Step 2: Convert to fraction form
    485.87/727.67 = 355.54/x
  3. Step 3: Cross multiply
    485.87x = 727.67 × 355.54
  4. Step 4: Simplify right side
    485.87x = 258,715.79
  5. Step 5: Solve for x
    x = 258,715.79/485.87
  6. Step 6: Final answer
    x = 532.48

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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.