Home / 1,288.86-1,933.42-423.17

Finding the Fourth Proportional to 1,288.86, 1,933.42 and 423.17

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Solution

The fourth proportional to 1,288.86, 1,933.42 and 423.17 is: 634.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.86 : 1,933.42 = 423.17 : x
  2. Step 2: Convert to fraction form
    1,288.86/1,933.42 = 423.17/x
  3. Step 3: Cross multiply
    1,288.86x = 1,933.42 × 423.17
  4. Step 4: Simplify right side
    1,288.86x = 818,165.34
  5. Step 5: Solve for x
    x = 818,165.34/1,288.86
  6. Step 6: Final answer
    x = 634.80

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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.