Home / 1,391.51-2,087.42-1,049.15

Finding the Fourth Proportional to 1,391.51, 2,087.42 and 1,049.15

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Solution

The fourth proportional to 1,391.51, 2,087.42 and 1,049.15 is: 1,573.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.51 : 2,087.42 = 1,049.15 : x
  2. Step 2: Convert to fraction form
    1,391.51/2,087.42 = 1,049.15/x
  3. Step 3: Cross multiply
    1,391.51x = 2,087.42 × 1,049.15
  4. Step 4: Simplify right side
    1,391.51x = 2,190,001.01
  5. Step 5: Solve for x
    x = 2,190,001.01/1,391.51
  6. Step 6: Final answer
    x = 1,573.84

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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.