Home / 2,172.40-3,258.60-1,394.80

Finding the Fourth Proportional to 2,172.40, 3,258.60 and 1,394.80

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Solution

The fourth proportional to 2,172.40, 3,258.60 and 1,394.80 is: 2,092.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.40 : 3,258.60 = 1,394.80 : x
  2. Step 2: Convert to fraction form
    2,172.40/3,258.60 = 1,394.80/x
  3. Step 3: Cross multiply
    2,172.40x = 3,258.60 × 1,394.80
  4. Step 4: Simplify right side
    2,172.40x = 4,545,095.28
  5. Step 5: Solve for x
    x = 4,545,095.28/2,172.40
  6. Step 6: Final answer
    x = 2,092.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.