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Finding the Fourth Proportional to 1,641.85, 2,464.09 and 764.75

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Solution

The fourth proportional to 1,641.85, 2,464.09 and 764.75 is: 1,147.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.85 : 2,464.09 = 764.75 : x
  2. Step 2: Convert to fraction form
    1,641.85/2,464.09 = 764.75/x
  3. Step 3: Cross multiply
    1,641.85x = 2,464.09 × 764.75
  4. Step 4: Simplify right side
    1,641.85x = 1,884,417.08
  5. Step 5: Solve for x
    x = 1,884,417.08/1,641.85
  6. Step 6: Final answer
    x = 1,147.74

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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.