Home / 1,288.68-1,933.38-423.06

Finding the Fourth Proportional to 1,288.68, 1,933.38 and 423.06

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Solution

The fourth proportional to 1,288.68, 1,933.38 and 423.06 is: 634.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.68 : 1,933.38 = 423.06 : x
  2. Step 2: Convert to fraction form
    1,288.68/1,933.38 = 423.06/x
  3. Step 3: Cross multiply
    1,288.68x = 1,933.38 × 423.06
  4. Step 4: Simplify right side
    1,288.68x = 817,935.74
  5. Step 5: Solve for x
    x = 817,935.74/1,288.68
  6. Step 6: Final answer
    x = 634.71

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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.