Home / 3,120.75-4,312.76-2,560.32

Finding the Fourth Proportional to 3,120.75, 4,312.76 and 2,560.32

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Solution

The fourth proportional to 3,120.75, 4,312.76 and 2,560.32 is: 3,538.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.75 : 4,312.76 = 2,560.32 : x
  2. Step 2: Convert to fraction form
    3,120.75/4,312.76 = 2,560.32/x
  3. Step 3: Cross multiply
    3,120.75x = 4,312.76 × 2,560.32
  4. Step 4: Simplify right side
    3,120.75x = 11,042,032.88
  5. Step 5: Solve for x
    x = 11,042,032.88/3,120.75
  6. Step 6: Final answer
    x = 3,538.26

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.