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Finding the Fourth Proportional to 548.32, 756.60 and 315.46

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Solution

The fourth proportional to 548.32, 756.60 and 315.46 is: 435.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.32 : 756.60 = 315.46 : x
  2. Step 2: Convert to fraction form
    548.32/756.60 = 315.46/x
  3. Step 3: Cross multiply
    548.32x = 756.60 × 315.46
  4. Step 4: Simplify right side
    548.32x = 238,677.04
  5. Step 5: Solve for x
    x = 238,677.04/548.32
  6. Step 6: Final answer
    x = 435.29

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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.