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Finding the Fourth Proportional to 995.78, 1,492.25 and 779.10

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Solution

The fourth proportional to 995.78, 1,492.25 and 779.10 is: 1,167.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.78 : 1,492.25 = 779.10 : x
  2. Step 2: Convert to fraction form
    995.78/1,492.25 = 779.10/x
  3. Step 3: Cross multiply
    995.78x = 1,492.25 × 779.10
  4. Step 4: Simplify right side
    995.78x = 1,162,608.08
  5. Step 5: Solve for x
    x = 1,162,608.08/995.78
  6. Step 6: Final answer
    x = 1,167.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.