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Finding the Fourth Proportional to 922.16, 1,272.06 and 548.90

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Solution

The fourth proportional to 922.16, 1,272.06 and 548.90 is: 757.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.16 : 1,272.06 = 548.90 : x
  2. Step 2: Convert to fraction form
    922.16/1,272.06 = 548.90/x
  3. Step 3: Cross multiply
    922.16x = 1,272.06 × 548.90
  4. Step 4: Simplify right side
    922.16x = 698,233.73
  5. Step 5: Solve for x
    x = 698,233.73/922.16
  6. Step 6: Final answer
    x = 757.17

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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.