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Finding the Fourth Proportional to 548.38, 756.98 and 402.18

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Solution

The fourth proportional to 548.38, 756.98 and 402.18 is: 555.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.38 : 756.98 = 402.18 : x
  2. Step 2: Convert to fraction form
    548.38/756.98 = 402.18/x
  3. Step 3: Cross multiply
    548.38x = 756.98 × 402.18
  4. Step 4: Simplify right side
    548.38x = 304,442.22
  5. Step 5: Solve for x
    x = 304,442.22/548.38
  6. Step 6: Final answer
    x = 555.17

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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.