Home / 1,299.40-1,948.38-1,145.68

Finding the Fourth Proportional to 1,299.40, 1,948.38 and 1,145.68

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Solution

The fourth proportional to 1,299.40, 1,948.38 and 1,145.68 is: 1,717.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.40 : 1,948.38 = 1,145.68 : x
  2. Step 2: Convert to fraction form
    1,299.40/1,948.38 = 1,145.68/x
  3. Step 3: Cross multiply
    1,299.40x = 1,948.38 × 1,145.68
  4. Step 4: Simplify right side
    1,299.40x = 2,232,220.00
  5. Step 5: Solve for x
    x = 2,232,220.00/1,299.40
  6. Step 6: Final answer
    x = 1,717.89

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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.