Home / 1,869.09-2,578.55-1,205.70

Finding the Fourth Proportional to 1,869.09, 2,578.55 and 1,205.70

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Solution

The fourth proportional to 1,869.09, 2,578.55 and 1,205.70 is: 1,663.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.09 : 2,578.55 = 1,205.70 : x
  2. Step 2: Convert to fraction form
    1,869.09/2,578.55 = 1,205.70/x
  3. Step 3: Cross multiply
    1,869.09x = 2,578.55 × 1,205.70
  4. Step 4: Simplify right side
    1,869.09x = 3,108,951.71
  5. Step 5: Solve for x
    x = 3,108,951.71/1,869.09
  6. Step 6: Final answer
    x = 1,663.35

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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.