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Finding the Fourth Proportional to 1,227.99, 1,694.66 and 730.90

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Solution

The fourth proportional to 1,227.99, 1,694.66 and 730.90 is: 1,008.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.99 : 1,694.66 = 730.90 : x
  2. Step 2: Convert to fraction form
    1,227.99/1,694.66 = 730.90/x
  3. Step 3: Cross multiply
    1,227.99x = 1,694.66 × 730.90
  4. Step 4: Simplify right side
    1,227.99x = 1,238,626.99
  5. Step 5: Solve for x
    x = 1,238,626.99/1,227.99
  6. Step 6: Final answer
    x = 1,008.66

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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.