Home / 3,120.10-4,680.94-928.84

Finding the Fourth Proportional to 3,120.10, 4,680.94 and 928.84

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Solution

The fourth proportional to 3,120.10, 4,680.94 and 928.84 is: 1,393.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.10 : 4,680.94 = 928.84 : x
  2. Step 2: Convert to fraction form
    3,120.10/4,680.94 = 928.84/x
  3. Step 3: Cross multiply
    3,120.10x = 4,680.94 × 928.84
  4. Step 4: Simplify right side
    3,120.10x = 4,347,844.31
  5. Step 5: Solve for x
    x = 4,347,844.31/3,120.10
  6. Step 6: Final answer
    x = 1,393.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 3,121.10, 4,682.44 and 929.84
Similar ratio
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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.