Home / 1,288.89-1,933.53-423.39

Finding the Fourth Proportional to 1,288.89, 1,933.53 and 423.39

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Solution

The fourth proportional to 1,288.89, 1,933.53 and 423.39 is: 635.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.89 : 1,933.53 = 423.39 : x
  2. Step 2: Convert to fraction form
    1,288.89/1,933.53 = 423.39/x
  3. Step 3: Cross multiply
    1,288.89x = 1,933.53 × 423.39
  4. Step 4: Simplify right side
    1,288.89x = 818,637.27
  5. Step 5: Solve for x
    x = 818,637.27/1,288.89
  6. Step 6: Final answer
    x = 635.15

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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.