Home / 1,329.40-1,991.46-1,039.48

Finding the Fourth Proportional to 1,329.40, 1,991.46 and 1,039.48

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Solution

The fourth proportional to 1,329.40, 1,991.46 and 1,039.48 is: 1,557.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.40 : 1,991.46 = 1,039.48 : x
  2. Step 2: Convert to fraction form
    1,329.40/1,991.46 = 1,039.48/x
  3. Step 3: Cross multiply
    1,329.40x = 1,991.46 × 1,039.48
  4. Step 4: Simplify right side
    1,329.40x = 2,070,082.84
  5. Step 5: Solve for x
    x = 2,070,082.84/1,329.40
  6. Step 6: Final answer
    x = 1,557.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.