Home / 1,863.10-2,569.80-1,272.70

Finding the Fourth Proportional to 1,863.10, 2,569.80 and 1,272.70

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Solution

The fourth proportional to 1,863.10, 2,569.80 and 1,272.70 is: 1,755.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.10 : 2,569.80 = 1,272.70 : x
  2. Step 2: Convert to fraction form
    1,863.10/2,569.80 = 1,272.70/x
  3. Step 3: Cross multiply
    1,863.10x = 2,569.80 × 1,272.70
  4. Step 4: Simplify right side
    1,863.10x = 3,270,584.46
  5. Step 5: Solve for x
    x = 3,270,584.46/1,863.10
  6. Step 6: Final answer
    x = 1,755.45

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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.