Home / 3,120.64-4,680.15-928.87

Finding the Fourth Proportional to 3,120.64, 4,680.15 and 928.87

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Solution

The fourth proportional to 3,120.64, 4,680.15 and 928.87 is: 1,393.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.64 : 4,680.15 = 928.87 : x
  2. Step 2: Convert to fraction form
    3,120.64/4,680.15 = 928.87/x
  3. Step 3: Cross multiply
    3,120.64x = 4,680.15 × 928.87
  4. Step 4: Simplify right side
    3,120.64x = 4,347,250.93
  5. Step 5: Solve for x
    x = 4,347,250.93/3,120.64
  6. Step 6: Final answer
    x = 1,393.06

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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.