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Finding the Fourth Proportional to 548.95, 757.47 and 312.92

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Solution

The fourth proportional to 548.95, 757.47 and 312.92 is: 431.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.95 : 757.47 = 312.92 : x
  2. Step 2: Convert to fraction form
    548.95/757.47 = 312.92/x
  3. Step 3: Cross multiply
    548.95x = 757.47 × 312.92
  4. Step 4: Simplify right side
    548.95x = 237,029.84
  5. Step 5: Solve for x
    x = 237,029.84/548.95
  6. Step 6: Final answer
    x = 431.79

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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.