Home / 1,376.20-2,064.62-645.38

Finding the Fourth Proportional to 1,376.20, 2,064.62 and 645.38

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Solution

The fourth proportional to 1,376.20, 2,064.62 and 645.38 is: 968.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.20 : 2,064.62 = 645.38 : x
  2. Step 2: Convert to fraction form
    1,376.20/2,064.62 = 645.38/x
  3. Step 3: Cross multiply
    1,376.20x = 2,064.62 × 645.38
  4. Step 4: Simplify right side
    1,376.20x = 1,332,464.46
  5. Step 5: Solve for x
    x = 1,332,464.46/1,376.20
  6. Step 6: Final answer
    x = 968.22

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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.