Home / 1,189.05-1,784.34-1,098.87

Finding the Fourth Proportional to 1,189.05, 1,784.34 and 1,098.87

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Solution

The fourth proportional to 1,189.05, 1,784.34 and 1,098.87 is: 1,649.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.05 : 1,784.34 = 1,098.87 : x
  2. Step 2: Convert to fraction form
    1,189.05/1,784.34 = 1,098.87/x
  3. Step 3: Cross multiply
    1,189.05x = 1,784.34 × 1,098.87
  4. Step 4: Simplify right side
    1,189.05x = 1,960,757.70
  5. Step 5: Solve for x
    x = 1,960,757.70/1,189.05
  6. Step 6: Final answer
    x = 1,649.01

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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.