Home / 1,289.25-1,934.21-423.56

Finding the Fourth Proportional to 1,289.25, 1,934.21 and 423.56

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Solution

The fourth proportional to 1,289.25, 1,934.21 and 423.56 is: 635.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.25 : 1,934.21 = 423.56 : x
  2. Step 2: Convert to fraction form
    1,289.25/1,934.21 = 423.56/x
  3. Step 3: Cross multiply
    1,289.25x = 1,934.21 × 423.56
  4. Step 4: Simplify right side
    1,289.25x = 819,259.88
  5. Step 5: Solve for x
    x = 819,259.88/1,289.25
  6. Step 6: Final answer
    x = 635.45

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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.