Home / 3,119.64-4,680.20-928.32

Finding the Fourth Proportional to 3,119.64, 4,680.20 and 928.32

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Solution

The fourth proportional to 3,119.64, 4,680.20 and 928.32 is: 1,392.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.64 : 4,680.20 = 928.32 : x
  2. Step 2: Convert to fraction form
    3,119.64/4,680.20 = 928.32/x
  3. Step 3: Cross multiply
    3,119.64x = 4,680.20 × 928.32
  4. Step 4: Simplify right side
    3,119.64x = 4,344,723.26
  5. Step 5: Solve for x
    x = 4,344,723.26/3,119.64
  6. Step 6: Final answer
    x = 1,392.70

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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.