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Finding the Fourth Proportional to 548.36, 756.70 and 312.27

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Solution

The fourth proportional to 548.36, 756.70 and 312.27 is: 430.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.36 : 756.70 = 312.27 : x
  2. Step 2: Convert to fraction form
    548.36/756.70 = 312.27/x
  3. Step 3: Cross multiply
    548.36x = 756.70 × 312.27
  4. Step 4: Simplify right side
    548.36x = 236,293.15
  5. Step 5: Solve for x
    x = 236,293.15/548.36
  6. Step 6: Final answer
    x = 430.91

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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.