Home / 1,100.81-1,529.78-1,087.04

Finding the Fourth Proportional to 1,100.81, 1,529.78 and 1,087.04

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Solution

The fourth proportional to 1,100.81, 1,529.78 and 1,087.04 is: 1,510.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.81 : 1,529.78 = 1,087.04 : x
  2. Step 2: Convert to fraction form
    1,100.81/1,529.78 = 1,087.04/x
  3. Step 3: Cross multiply
    1,100.81x = 1,529.78 × 1,087.04
  4. Step 4: Simplify right side
    1,100.81x = 1,662,918.97
  5. Step 5: Solve for x
    x = 1,662,918.97/1,100.81
  6. Step 6: Final answer
    x = 1,510.64

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.