Home / 1,275.28-1,902.50-1,214.80

Finding the Fourth Proportional to 1,275.28, 1,902.50 and 1,214.80

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Solution

The fourth proportional to 1,275.28, 1,902.50 and 1,214.80 is: 1,812.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.28 : 1,902.50 = 1,214.80 : x
  2. Step 2: Convert to fraction form
    1,275.28/1,902.50 = 1,214.80/x
  3. Step 3: Cross multiply
    1,275.28x = 1,902.50 × 1,214.80
  4. Step 4: Simplify right side
    1,275.28x = 2,311,157
  5. Step 5: Solve for x
    x = 2,311,157/1,275.28
  6. Step 6: Final answer
    x = 1,812.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.