Home / 2,121.32-2,927.61-1,225.23

Finding the Fourth Proportional to 2,121.32, 2,927.61 and 1,225.23

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Solution

The fourth proportional to 2,121.32, 2,927.61 and 1,225.23 is: 1,690.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.32 : 2,927.61 = 1,225.23 : x
  2. Step 2: Convert to fraction form
    2,121.32/2,927.61 = 1,225.23/x
  3. Step 3: Cross multiply
    2,121.32x = 2,927.61 × 1,225.23
  4. Step 4: Simplify right side
    2,121.32x = 3,586,995.60
  5. Step 5: Solve for x
    x = 3,586,995.60/2,121.32
  6. Step 6: Final answer
    x = 1,690.93

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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.