Home / 1,126.07-1,686.49-1,087.15

Finding the Fourth Proportional to 1,126.07, 1,686.49 and 1,087.15

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Solution

The fourth proportional to 1,126.07, 1,686.49 and 1,087.15 is: 1,628.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.07 : 1,686.49 = 1,087.15 : x
  2. Step 2: Convert to fraction form
    1,126.07/1,686.49 = 1,087.15/x
  3. Step 3: Cross multiply
    1,126.07x = 1,686.49 × 1,087.15
  4. Step 4: Simplify right side
    1,126.07x = 1,833,456.45
  5. Step 5: Solve for x
    x = 1,833,456.45/1,126.07
  6. Step 6: Final answer
    x = 1,628.20

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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.