Home / 3,619.52-5,430.08-1,311.20

Finding the Fourth Proportional to 3,619.52, 5,430.08 and 1,311.20

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Solution

The fourth proportional to 3,619.52, 5,430.08 and 1,311.20 is: 1,967.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.52 : 5,430.08 = 1,311.20 : x
  2. Step 2: Convert to fraction form
    3,619.52/5,430.08 = 1,311.20/x
  3. Step 3: Cross multiply
    3,619.52x = 5,430.08 × 1,311.20
  4. Step 4: Simplify right side
    3,619.52x = 7,119,920.90
  5. Step 5: Solve for x
    x = 7,119,920.90/3,619.52
  6. Step 6: Final answer
    x = 1,967.09

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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.