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Finding the Fourth Proportional to 548.37, 756.72 and 312.35

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Solution

The fourth proportional to 548.37, 756.72 and 312.35 is: 431.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.37 : 756.72 = 312.35 : x
  2. Step 2: Convert to fraction form
    548.37/756.72 = 312.35/x
  3. Step 3: Cross multiply
    548.37x = 756.72 × 312.35
  4. Step 4: Simplify right side
    548.37x = 236,357.71
  5. Step 5: Solve for x
    x = 236,357.71/548.37
  6. Step 6: Final answer
    x = 431.02

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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.