Home / 1,727.38-2,591.10-428.81

Finding the Fourth Proportional to 1,727.38, 2,591.10 and 428.81

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Solution

The fourth proportional to 1,727.38, 2,591.10 and 428.81 is: 643.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,727.38 : 2,591.10 = 428.81 : x
  2. Step 2: Convert to fraction form
    1,727.38/2,591.10 = 428.81/x
  3. Step 3: Cross multiply
    1,727.38x = 2,591.10 × 428.81
  4. Step 4: Simplify right side
    1,727.38x = 1,111,096.07
  5. Step 5: Solve for x
    x = 1,111,096.07/1,727.38
  6. Step 6: Final answer
    x = 643.23

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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.