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Finding the Fourth Proportional to 547.74, 822.69 and 485.10

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Solution

The fourth proportional to 547.74, 822.69 and 485.10 is: 728.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.74 : 822.69 = 485.10 : x
  2. Step 2: Convert to fraction form
    547.74/822.69 = 485.10/x
  3. Step 3: Cross multiply
    547.74x = 822.69 × 485.10
  4. Step 4: Simplify right side
    547.74x = 399,086.92
  5. Step 5: Solve for x
    x = 399,086.92/547.74
  6. Step 6: Final answer
    x = 728.61

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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.