Home / 1,441.12-2,161.80-619.20

Finding the Fourth Proportional to 1,441.12, 2,161.80 and 619.20

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Solution

The fourth proportional to 1,441.12, 2,161.80 and 619.20 is: 928.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,441.12 : 2,161.80 = 619.20 : x
  2. Step 2: Convert to fraction form
    1,441.12/2,161.80 = 619.20/x
  3. Step 3: Cross multiply
    1,441.12x = 2,161.80 × 619.20
  4. Step 4: Simplify right side
    1,441.12x = 1,338,572.66
  5. Step 5: Solve for x
    x = 1,338,572.66/1,441.12
  6. Step 6: Final answer
    x = 928.84

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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.