Home / 2,157.40-2,976.90-1,225.84

Finding the Fourth Proportional to 2,157.40, 2,976.90 and 1,225.84

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Solution

The fourth proportional to 2,157.40, 2,976.90 and 1,225.84 is: 1,691.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.40 : 2,976.90 = 1,225.84 : x
  2. Step 2: Convert to fraction form
    2,157.40/2,976.90 = 1,225.84/x
  3. Step 3: Cross multiply
    2,157.40x = 2,976.90 × 1,225.84
  4. Step 4: Simplify right side
    2,157.40x = 3,649,203.10
  5. Step 5: Solve for x
    x = 3,649,203.10/2,157.40
  6. Step 6: Final answer
    x = 1,691.48

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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.