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Finding the Fourth Proportional to 995.23, 1,372.84 and 808.93

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Solution

The fourth proportional to 995.23, 1,372.84 and 808.93 is: 1,115.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.23 : 1,372.84 = 808.93 : x
  2. Step 2: Convert to fraction form
    995.23/1,372.84 = 808.93/x
  3. Step 3: Cross multiply
    995.23x = 1,372.84 × 808.93
  4. Step 4: Simplify right side
    995.23x = 1,110,531.46
  5. Step 5: Solve for x
    x = 1,110,531.46/995.23
  6. Step 6: Final answer
    x = 1,115.85

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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.