Home / 1,289.12-1,933.70-423.52

Finding the Fourth Proportional to 1,289.12, 1,933.70 and 423.52

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Solution

The fourth proportional to 1,289.12, 1,933.70 and 423.52 is: 635.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.12 : 1,933.70 = 423.52 : x
  2. Step 2: Convert to fraction form
    1,289.12/1,933.70 = 423.52/x
  3. Step 3: Cross multiply
    1,289.12x = 1,933.70 × 423.52
  4. Step 4: Simplify right side
    1,289.12x = 818,960.62
  5. Step 5: Solve for x
    x = 818,960.62/1,289.12
  6. Step 6: Final answer
    x = 635.29

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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.