Home / 1,289.09-1,933.77-423.47

Finding the Fourth Proportional to 1,289.09, 1,933.77 and 423.47

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Solution

The fourth proportional to 1,289.09, 1,933.77 and 423.47 is: 635.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.09 : 1,933.77 = 423.47 : x
  2. Step 2: Convert to fraction form
    1,289.09/1,933.77 = 423.47/x
  3. Step 3: Cross multiply
    1,289.09x = 1,933.77 × 423.47
  4. Step 4: Simplify right side
    1,289.09x = 818,893.58
  5. Step 5: Solve for x
    x = 818,893.58/1,289.09
  6. Step 6: Final answer
    x = 635.25

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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.