Home / 1,642.38-2,464.20-669.30

Finding the Fourth Proportional to 1,642.38, 2,464.20 and 669.30

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Solution

The fourth proportional to 1,642.38, 2,464.20 and 669.30 is: 1,004.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.38 : 2,464.20 = 669.30 : x
  2. Step 2: Convert to fraction form
    1,642.38/2,464.20 = 669.30/x
  3. Step 3: Cross multiply
    1,642.38x = 2,464.20 × 669.30
  4. Step 4: Simplify right side
    1,642.38x = 1,649,289.06
  5. Step 5: Solve for x
    x = 1,649,289.06/1,642.38
  6. Step 6: Final answer
    x = 1,004.21

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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.