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Finding the Fourth Proportional to 995.41, 1,376.32 and 979.82

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Solution

The fourth proportional to 995.41, 1,376.32 and 979.82 is: 1,354.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.41 : 1,376.32 = 979.82 : x
  2. Step 2: Convert to fraction form
    995.41/1,376.32 = 979.82/x
  3. Step 3: Cross multiply
    995.41x = 1,376.32 × 979.82
  4. Step 4: Simplify right side
    995.41x = 1,348,545.86
  5. Step 5: Solve for x
    x = 1,348,545.86/995.41
  6. Step 6: Final answer
    x = 1,354.76

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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.