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Finding the Fourth Proportional to 1,081.62, 1,492.80 and 662.22

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Solution

The fourth proportional to 1,081.62, 1,492.80 and 662.22 is: 913.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.62 : 1,492.80 = 662.22 : x
  2. Step 2: Convert to fraction form
    1,081.62/1,492.80 = 662.22/x
  3. Step 3: Cross multiply
    1,081.62x = 1,492.80 × 662.22
  4. Step 4: Simplify right side
    1,081.62x = 988,562.02
  5. Step 5: Solve for x
    x = 988,562.02/1,081.62
  6. Step 6: Final answer
    x = 913.96

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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.