Home / 3,120.36-4,680.78-929.08

Finding the Fourth Proportional to 3,120.36, 4,680.78 and 929.08

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Solution

The fourth proportional to 3,120.36, 4,680.78 and 929.08 is: 1,393.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.36 : 4,680.78 = 929.08 : x
  2. Step 2: Convert to fraction form
    3,120.36/4,680.78 = 929.08/x
  3. Step 3: Cross multiply
    3,120.36x = 4,680.78 × 929.08
  4. Step 4: Simplify right side
    3,120.36x = 4,348,819.08
  5. Step 5: Solve for x
    x = 4,348,819.08/3,120.36
  6. Step 6: Final answer
    x = 1,393.69

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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.