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Finding the Fourth Proportional to 2,107.69, 3,159.74 and 874.33

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Solution

The fourth proportional to 2,107.69, 3,159.74 and 874.33 is: 1,310.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.69 : 3,159.74 = 874.33 : x
  2. Step 2: Convert to fraction form
    2,107.69/3,159.74 = 874.33/x
  3. Step 3: Cross multiply
    2,107.69x = 3,159.74 × 874.33
  4. Step 4: Simplify right side
    2,107.69x = 2,762,649.76
  5. Step 5: Solve for x
    x = 2,762,649.76/2,107.69
  6. Step 6: Final answer
    x = 1,310.75

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1.5x scale

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.