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Finding the Fourth Proportional to 548.70, 753.17 and 485.14

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Solution

The fourth proportional to 548.70, 753.17 and 485.14 is: 665.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.70 : 753.17 = 485.14 : x
  2. Step 2: Convert to fraction form
    548.70/753.17 = 485.14/x
  3. Step 3: Cross multiply
    548.70x = 753.17 × 485.14
  4. Step 4: Simplify right side
    548.70x = 365,394.09
  5. Step 5: Solve for x
    x = 365,394.09/548.70
  6. Step 6: Final answer
    x = 665.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.