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Finding the Fourth Proportional to 1,441.29, 2,162.09 and 619.64

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Solution

The fourth proportional to 1,441.29, 2,162.09 and 619.64 is: 929.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,441.29 : 2,162.09 = 619.64 : x
  2. Step 2: Convert to fraction form
    1,441.29/2,162.09 = 619.64/x
  3. Step 3: Cross multiply
    1,441.29x = 2,162.09 × 619.64
  4. Step 4: Simplify right side
    1,441.29x = 1,339,728.46
  5. Step 5: Solve for x
    x = 1,339,728.46/1,441.29
  6. Step 6: Final answer
    x = 929.54

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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.