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Finding the Fourth Proportional to 548.41, 756.80 and 315.53

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Solution

The fourth proportional to 548.41, 756.80 and 315.53 is: 435.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.41 : 756.80 = 315.53 : x
  2. Step 2: Convert to fraction form
    548.41/756.80 = 315.53/x
  3. Step 3: Cross multiply
    548.41x = 756.80 × 315.53
  4. Step 4: Simplify right side
    548.41x = 238,795.00
  5. Step 5: Solve for x
    x = 238,795.00/548.41
  6. Step 6: Final answer
    x = 435.43

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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.