Home / 1,289.19-1,941.89-1,272.18

Finding the Fourth Proportional to 1,289.19, 1,941.89 and 1,272.18

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Solution

The fourth proportional to 1,289.19, 1,941.89 and 1,272.18 is: 1,916.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.19 : 1,941.89 = 1,272.18 : x
  2. Step 2: Convert to fraction form
    1,289.19/1,941.89 = 1,272.18/x
  3. Step 3: Cross multiply
    1,289.19x = 1,941.89 × 1,272.18
  4. Step 4: Simplify right side
    1,289.19x = 2,470,436.80
  5. Step 5: Solve for x
    x = 2,470,436.80/1,289.19
  6. Step 6: Final answer
    x = 1,916.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.