Home / 1,869.49-2,579.96-1,123.78

Finding the Fourth Proportional to 1,869.49, 2,579.96 and 1,123.78

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Solution

The fourth proportional to 1,869.49, 2,579.96 and 1,123.78 is: 1,550.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.49 : 2,579.96 = 1,123.78 : x
  2. Step 2: Convert to fraction form
    1,869.49/2,579.96 = 1,123.78/x
  3. Step 3: Cross multiply
    1,869.49x = 2,579.96 × 1,123.78
  4. Step 4: Simplify right side
    1,869.49x = 2,899,307.45
  5. Step 5: Solve for x
    x = 2,899,307.45/1,869.49
  6. Step 6: Final answer
    x = 1,550.85

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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.