Home / 1,869.34-2,578.80-1,205.86

Finding the Fourth Proportional to 1,869.34, 2,578.80 and 1,205.86

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Solution

The fourth proportional to 1,869.34, 2,578.80 and 1,205.86 is: 1,663.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.34 : 2,578.80 = 1,205.86 : x
  2. Step 2: Convert to fraction form
    1,869.34/2,578.80 = 1,205.86/x
  3. Step 3: Cross multiply
    1,869.34x = 2,578.80 × 1,205.86
  4. Step 4: Simplify right side
    1,869.34x = 3,109,671.77
  5. Step 5: Solve for x
    x = 3,109,671.77/1,869.34
  6. Step 6: Final answer
    x = 1,663.51

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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.