Home / 1,869.21-2,579.90-1,239.77

Finding the Fourth Proportional to 1,869.21, 2,579.90 and 1,239.77

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Solution

The fourth proportional to 1,869.21, 2,579.90 and 1,239.77 is: 1,711.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.21 : 2,579.90 = 1,239.77 : x
  2. Step 2: Convert to fraction form
    1,869.21/2,579.90 = 1,239.77/x
  3. Step 3: Cross multiply
    1,869.21x = 2,579.90 × 1,239.77
  4. Step 4: Simplify right side
    1,869.21x = 3,198,482.87
  5. Step 5: Solve for x
    x = 3,198,482.87/1,869.21
  6. Step 6: Final answer
    x = 1,711.14

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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.