Home / 1,430.33-2,145.69-727.79

Finding the Fourth Proportional to 1,430.33, 2,145.69 and 727.79

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Solution

The fourth proportional to 1,430.33, 2,145.69 and 727.79 is: 1,091.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.33 : 2,145.69 = 727.79 : x
  2. Step 2: Convert to fraction form
    1,430.33/2,145.69 = 727.79/x
  3. Step 3: Cross multiply
    1,430.33x = 2,145.69 × 727.79
  4. Step 4: Simplify right side
    1,430.33x = 1,561,601.00
  5. Step 5: Solve for x
    x = 1,561,601.00/1,430.33
  6. Step 6: Final answer
    x = 1,091.78

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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.