Home / 2,121.32-2,927.70-1,190.12

Finding the Fourth Proportional to 2,121.32, 2,927.70 and 1,190.12

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Solution

The fourth proportional to 2,121.32, 2,927.70 and 1,190.12 is: 1,642.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.32 : 2,927.70 = 1,190.12 : x
  2. Step 2: Convert to fraction form
    2,121.32/2,927.70 = 1,190.12/x
  3. Step 3: Cross multiply
    2,121.32x = 2,927.70 × 1,190.12
  4. Step 4: Simplify right side
    2,121.32x = 3,484,314.32
  5. Step 5: Solve for x
    x = 3,484,314.32/2,121.32
  6. Step 6: Final answer
    x = 1,642.52

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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.