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Finding the Fourth Proportional to 548.83, 757.17 and 312.76

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Solution

The fourth proportional to 548.83, 757.17 and 312.76 is: 431.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.83 : 757.17 = 312.76 : x
  2. Step 2: Convert to fraction form
    548.83/757.17 = 312.76/x
  3. Step 3: Cross multiply
    548.83x = 757.17 × 312.76
  4. Step 4: Simplify right side
    548.83x = 236,808.70
  5. Step 5: Solve for x
    x = 236,808.70/548.83
  6. Step 6: Final answer
    x = 431.48

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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.