Home / 1,869.74-2,579.39-1,206.81

Finding the Fourth Proportional to 1,869.74, 2,579.39 and 1,206.81

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Solution

The fourth proportional to 1,869.74, 2,579.39 and 1,206.81 is: 1,664.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.74 : 2,579.39 = 1,206.81 : x
  2. Step 2: Convert to fraction form
    1,869.74/2,579.39 = 1,206.81/x
  3. Step 3: Cross multiply
    1,869.74x = 2,579.39 × 1,206.81
  4. Step 4: Simplify right side
    1,869.74x = 3,112,827.61
  5. Step 5: Solve for x
    x = 3,112,827.61/1,869.74
  6. Step 6: Final answer
    x = 1,664.85

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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.