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Finding the Fourth Proportional to 548.13, 756.68 and 351.76

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Solution

The fourth proportional to 548.13, 756.68 and 351.76 is: 485.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.13 : 756.68 = 351.76 : x
  2. Step 2: Convert to fraction form
    548.13/756.68 = 351.76/x
  3. Step 3: Cross multiply
    548.13x = 756.68 × 351.76
  4. Step 4: Simplify right side
    548.13x = 266,166.11
  5. Step 5: Solve for x
    x = 266,166.11/548.13
  6. Step 6: Final answer
    x = 485.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.