Home / 2,172.40-2,998.22-1,228.48

Finding the Fourth Proportional to 2,172.40, 2,998.22 and 1,228.48

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Solution

The fourth proportional to 2,172.40, 2,998.22 and 1,228.48 is: 1,695.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.40 : 2,998.22 = 1,228.48 : x
  2. Step 2: Convert to fraction form
    2,172.40/2,998.22 = 1,228.48/x
  3. Step 3: Cross multiply
    2,172.40x = 2,998.22 × 1,228.48
  4. Step 4: Simplify right side
    2,172.40x = 3,683,253.31
  5. Step 5: Solve for x
    x = 3,683,253.31/2,172.40
  6. Step 6: Final answer
    x = 1,695.48

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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.