Home / 1,921.32-2,651.38-1,175.12

Finding the Fourth Proportional to 1,921.32, 2,651.38 and 1,175.12

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Solution

The fourth proportional to 1,921.32, 2,651.38 and 1,175.12 is: 1,621.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.32 : 2,651.38 = 1,175.12 : x
  2. Step 2: Convert to fraction form
    1,921.32/2,651.38 = 1,175.12/x
  3. Step 3: Cross multiply
    1,921.32x = 2,651.38 × 1,175.12
  4. Step 4: Simplify right side
    1,921.32x = 3,115,689.67
  5. Step 5: Solve for x
    x = 3,115,689.67/1,921.32
  6. Step 6: Final answer
    x = 1,621.64

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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.