Home / 3,120.46-4,680.63-929.20

Finding the Fourth Proportional to 3,120.46, 4,680.63 and 929.20

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Solution

The fourth proportional to 3,120.46, 4,680.63 and 929.20 is: 1,393.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.46 : 4,680.63 = 929.20 : x
  2. Step 2: Convert to fraction form
    3,120.46/4,680.63 = 929.20/x
  3. Step 3: Cross multiply
    3,120.46x = 4,680.63 × 929.20
  4. Step 4: Simplify right side
    3,120.46x = 4,349,241.40
  5. Step 5: Solve for x
    x = 4,349,241.40/3,120.46
  6. Step 6: Final answer
    x = 1,393.78

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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.