Home / 3,620.40-5,430.96-1,311.36

Finding the Fourth Proportional to 3,620.40, 5,430.96 and 1,311.36

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Solution

The fourth proportional to 3,620.40, 5,430.96 and 1,311.36 is: 1,967.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.40 : 5,430.96 = 1,311.36 : x
  2. Step 2: Convert to fraction form
    3,620.40/5,430.96 = 1,311.36/x
  3. Step 3: Cross multiply
    3,620.40x = 5,430.96 × 1,311.36
  4. Step 4: Simplify right side
    3,620.40x = 7,121,943.71
  5. Step 5: Solve for x
    x = 7,121,943.71/3,620.40
  6. Step 6: Final answer
    x = 1,967.17

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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.