Home / 2,661.09-3,991.66-929.72

Finding the Fourth Proportional to 2,661.09, 3,991.66 and 929.72

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Solution

The fourth proportional to 2,661.09, 3,991.66 and 929.72 is: 1,394.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661.09 : 3,991.66 = 929.72 : x
  2. Step 2: Convert to fraction form
    2,661.09/3,991.66 = 929.72/x
  3. Step 3: Cross multiply
    2,661.09x = 3,991.66 × 929.72
  4. Step 4: Simplify right side
    2,661.09x = 3,711,126.14
  5. Step 5: Solve for x
    x = 3,711,126.14/2,661.09
  6. Step 6: Final answer
    x = 1,394.59

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1.5x scale

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.