Home / 3,109.99-4,663.36-918.43

Finding the Fourth Proportional to 3,109.99, 4,663.36 and 918.43

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Solution

The fourth proportional to 3,109.99, 4,663.36 and 918.43 is: 1,377.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.99 : 4,663.36 = 918.43 : x
  2. Step 2: Convert to fraction form
    3,109.99/4,663.36 = 918.43/x
  3. Step 3: Cross multiply
    3,109.99x = 4,663.36 × 918.43
  4. Step 4: Simplify right side
    3,109.99x = 4,282,969.72
  5. Step 5: Solve for x
    x = 4,282,969.72/3,109.99
  6. Step 6: Final answer
    x = 1,377.17

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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.