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Finding the Fourth Proportional to 995.85, 1,372.82 and 747.18

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Solution

The fourth proportional to 995.85, 1,372.82 and 747.18 is: 1,030.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.85 : 1,372.82 = 747.18 : x
  2. Step 2: Convert to fraction form
    995.85/1,372.82 = 747.18/x
  3. Step 3: Cross multiply
    995.85x = 1,372.82 × 747.18
  4. Step 4: Simplify right side
    995.85x = 1,025,739.91
  5. Step 5: Solve for x
    x = 1,025,739.91/995.85
  6. Step 6: Final answer
    x = 1,030.01

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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.