Home / 1,645.38-2,464.29-1,320.30

Finding the Fourth Proportional to 1,645.38, 2,464.29 and 1,320.30

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Solution

The fourth proportional to 1,645.38, 2,464.29 and 1,320.30 is: 1,977.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.38 : 2,464.29 = 1,320.30 : x
  2. Step 2: Convert to fraction form
    1,645.38/2,464.29 = 1,320.30/x
  3. Step 3: Cross multiply
    1,645.38x = 2,464.29 × 1,320.30
  4. Step 4: Simplify right side
    1,645.38x = 3,253,602.09
  5. Step 5: Solve for x
    x = 3,253,602.09/1,645.38
  6. Step 6: Final answer
    x = 1,977.42

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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.