Home / 2,156.50-2,975.97-1,225.18

Finding the Fourth Proportional to 2,156.50, 2,975.97 and 1,225.18

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Solution

The fourth proportional to 2,156.50, 2,975.97 and 1,225.18 is: 1,690.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.50 : 2,975.97 = 1,225.18 : x
  2. Step 2: Convert to fraction form
    2,156.50/2,975.97 = 1,225.18/x
  3. Step 3: Cross multiply
    2,156.50x = 2,975.97 × 1,225.18
  4. Step 4: Simplify right side
    2,156.50x = 3,646,098.92
  5. Step 5: Solve for x
    x = 3,646,098.92/2,156.50
  6. Step 6: Final answer
    x = 1,690.75

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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.