Home / 1,329.69-1,838.49-1,165.65

Finding the Fourth Proportional to 1,329.69, 1,838.49 and 1,165.65

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Solution

The fourth proportional to 1,329.69, 1,838.49 and 1,165.65 is: 1,611.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.69 : 1,838.49 = 1,165.65 : x
  2. Step 2: Convert to fraction form
    1,329.69/1,838.49 = 1,165.65/x
  3. Step 3: Cross multiply
    1,329.69x = 1,838.49 × 1,165.65
  4. Step 4: Simplify right side
    1,329.69x = 2,143,035.87
  5. Step 5: Solve for x
    x = 2,143,035.87/1,329.69
  6. Step 6: Final answer
    x = 1,611.68

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Double scale
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1.5x scale

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.