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Finding the Fourth Proportional to 1,236.18, 1,705.02 and 922.14

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Solution

The fourth proportional to 1,236.18, 1,705.02 and 922.14 is: 1,271.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.18 : 1,705.02 = 922.14 : x
  2. Step 2: Convert to fraction form
    1,236.18/1,705.02 = 922.14/x
  3. Step 3: Cross multiply
    1,236.18x = 1,705.02 × 922.14
  4. Step 4: Simplify right side
    1,236.18x = 1,572,267.14
  5. Step 5: Solve for x
    x = 1,572,267.14/1,236.18
  6. Step 6: Final answer
    x = 1,271.88

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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.