Home / 1,539.49-2,123.94-949.81

Finding the Fourth Proportional to 1,539.49, 2,123.94 and 949.81

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Solution

The fourth proportional to 1,539.49, 2,123.94 and 949.81 is: 1,310.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.49 : 2,123.94 = 949.81 : x
  2. Step 2: Convert to fraction form
    1,539.49/2,123.94 = 949.81/x
  3. Step 3: Cross multiply
    1,539.49x = 2,123.94 × 949.81
  4. Step 4: Simplify right side
    1,539.49x = 2,017,339.45
  5. Step 5: Solve for x
    x = 2,017,339.45/1,539.49
  6. Step 6: Final answer
    x = 1,310.39

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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.