Home / 3,619.80-5,430-1,154.97

Finding the Fourth Proportional to 3,619.80, 5,430 and 1,154.97

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Solution

The fourth proportional to 3,619.80, 5,430 and 1,154.97 is: 1,732.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.80 : 5,430 = 1,154.97 : x
  2. Step 2: Convert to fraction form
    3,619.80/5,430 = 1,154.97/x
  3. Step 3: Cross multiply
    3,619.80x = 5,430 × 1,154.97
  4. Step 4: Simplify right side
    3,619.80x = 6,271,487.10
  5. Step 5: Solve for x
    x = 6,271,487.10/3,619.80
  6. Step 6: Final answer
    x = 1,732.55

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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.