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Finding the Fourth Proportional to 1,081.87, 1,492.99 and 616.15

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Solution

The fourth proportional to 1,081.87, 1,492.99 and 616.15 is: 850.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.87 : 1,492.99 = 616.15 : x
  2. Step 2: Convert to fraction form
    1,081.87/1,492.99 = 616.15/x
  3. Step 3: Cross multiply
    1,081.87x = 1,492.99 × 616.15
  4. Step 4: Simplify right side
    1,081.87x = 919,905.79
  5. Step 5: Solve for x
    x = 919,905.79/1,081.87
  6. Step 6: Final answer
    x = 850.29

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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.