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Finding the Fourth Proportional to 558.87, 835.37 and 485.16

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Solution

The fourth proportional to 558.87, 835.37 and 485.16 is: 725.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.87 : 835.37 = 485.16 : x
  2. Step 2: Convert to fraction form
    558.87/835.37 = 485.16/x
  3. Step 3: Cross multiply
    558.87x = 835.37 × 485.16
  4. Step 4: Simplify right side
    558.87x = 405,285.68
  5. Step 5: Solve for x
    x = 405,285.68/558.87
  6. Step 6: Final answer
    x = 725.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.