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Finding the Fourth Proportional to 777.91, 1,167.09 and 230.11

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Solution

The fourth proportional to 777.91, 1,167.09 and 230.11 is: 345.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.91 : 1,167.09 = 230.11 : x
  2. Step 2: Convert to fraction form
    777.91/1,167.09 = 230.11/x
  3. Step 3: Cross multiply
    777.91x = 1,167.09 × 230.11
  4. Step 4: Simplify right side
    777.91x = 268,559.08
  5. Step 5: Solve for x
    x = 268,559.08/777.91
  6. Step 6: Final answer
    x = 345.23

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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.