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Finding the Fourth Proportional to 1,099.81, 1,528.39 and 1,086.04

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Solution

The fourth proportional to 1,099.81, 1,528.39 and 1,086.04 is: 1,509.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.81 : 1,528.39 = 1,086.04 : x
  2. Step 2: Convert to fraction form
    1,099.81/1,528.39 = 1,086.04/x
  3. Step 3: Cross multiply
    1,099.81x = 1,528.39 × 1,086.04
  4. Step 4: Simplify right side
    1,099.81x = 1,659,885.03
  5. Step 5: Solve for x
    x = 1,659,885.03/1,099.81
  6. Step 6: Final answer
    x = 1,509.25

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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.