Home / 1,277.91-1,923.62-1,089.99

Finding the Fourth Proportional to 1,277.91, 1,923.62 and 1,089.99

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Solution

The fourth proportional to 1,277.91, 1,923.62 and 1,089.99 is: 1,640.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.91 : 1,923.62 = 1,089.99 : x
  2. Step 2: Convert to fraction form
    1,277.91/1,923.62 = 1,089.99/x
  3. Step 3: Cross multiply
    1,277.91x = 1,923.62 × 1,089.99
  4. Step 4: Simplify right side
    1,277.91x = 2,096,721.11
  5. Step 5: Solve for x
    x = 2,096,721.11/1,277.91
  6. Step 6: Final answer
    x = 1,640.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.