Home / 1,288.61-1,932.89-422.93

Finding the Fourth Proportional to 1,288.61, 1,932.89 and 422.93

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Solution

The fourth proportional to 1,288.61, 1,932.89 and 422.93 is: 634.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.61 : 1,932.89 = 422.93 : x
  2. Step 2: Convert to fraction form
    1,288.61/1,932.89 = 422.93/x
  3. Step 3: Cross multiply
    1,288.61x = 1,932.89 × 422.93
  4. Step 4: Simplify right side
    1,288.61x = 817,465.39
  5. Step 5: Solve for x
    x = 817,465.39/1,288.61
  6. Step 6: Final answer
    x = 634.38

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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.