Home / 1,906.88-2,630.40-1,120.32

Finding the Fourth Proportional to 1,906.88, 2,630.40 and 1,120.32

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Solution

The fourth proportional to 1,906.88, 2,630.40 and 1,120.32 is: 1,545.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.88 : 2,630.40 = 1,120.32 : x
  2. Step 2: Convert to fraction form
    1,906.88/2,630.40 = 1,120.32/x
  3. Step 3: Cross multiply
    1,906.88x = 2,630.40 × 1,120.32
  4. Step 4: Simplify right side
    1,906.88x = 2,946,889.73
  5. Step 5: Solve for x
    x = 2,946,889.73/1,906.88
  6. Step 6: Final answer
    x = 1,545.40

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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.