Home / 1,368.48-2,049.50-905.12

Finding the Fourth Proportional to 1,368.48, 2,049.50 and 905.12

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Solution

The fourth proportional to 1,368.48, 2,049.50 and 905.12 is: 1,355.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.48 : 2,049.50 = 905.12 : x
  2. Step 2: Convert to fraction form
    1,368.48/2,049.50 = 905.12/x
  3. Step 3: Cross multiply
    1,368.48x = 2,049.50 × 905.12
  4. Step 4: Simplify right side
    1,368.48x = 1,855,028.67
  5. Step 5: Solve for x
    x = 1,855,028.67/1,368.48
  6. Step 6: Final answer
    x = 1,355.54

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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.