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Finding the Fourth Proportional to 816.85, 1,127.26 and 443.83

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Solution

The fourth proportional to 816.85, 1,127.26 and 443.83 is: 612.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.85 : 1,127.26 = 443.83 : x
  2. Step 2: Convert to fraction form
    816.85/1,127.26 = 443.83/x
  3. Step 3: Cross multiply
    816.85x = 1,127.26 × 443.83
  4. Step 4: Simplify right side
    816.85x = 500,311.81
  5. Step 5: Solve for x
    x = 500,311.81/816.85
  6. Step 6: Final answer
    x = 612.49

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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.