Home / 3,115.09-4,298.77-1,698.78

Finding the Fourth Proportional to 3,115.09, 4,298.77 and 1,698.78

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Solution

The fourth proportional to 3,115.09, 4,298.77 and 1,698.78 is: 2,344.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.09 : 4,298.77 = 1,698.78 : x
  2. Step 2: Convert to fraction form
    3,115.09/4,298.77 = 1,698.78/x
  3. Step 3: Cross multiply
    3,115.09x = 4,298.77 × 1,698.78
  4. Step 4: Simplify right side
    3,115.09x = 7,302,651.63
  5. Step 5: Solve for x
    x = 7,302,651.63/3,115.09
  6. Step 6: Final answer
    x = 2,344.28

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Half 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.