Home / 3,619.12-5,430.30-3,609.40

Finding the Fourth Proportional to 3,619.12, 5,430.30 and 3,609.40

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Solution

The fourth proportional to 3,619.12, 5,430.30 and 3,609.40 is: 5,415.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.12 : 5,430.30 = 3,609.40 : x
  2. Step 2: Convert to fraction form
    3,619.12/5,430.30 = 3,609.40/x
  3. Step 3: Cross multiply
    3,619.12x = 5,430.30 × 3,609.40
  4. Step 4: Simplify right side
    3,619.12x = 19,600,124.82
  5. Step 5: Solve for x
    x = 19,600,124.82/3,619.12
  6. Step 6: Final answer
    x = 5,415.72

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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.