Home / 1,289.28-1,933.96-423.50

Finding the Fourth Proportional to 1,289.28, 1,933.96 and 423.50

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Solution

The fourth proportional to 1,289.28, 1,933.96 and 423.50 is: 635.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.28 : 1,933.96 = 423.50 : x
  2. Step 2: Convert to fraction form
    1,289.28/1,933.96 = 423.50/x
  3. Step 3: Cross multiply
    1,289.28x = 1,933.96 × 423.50
  4. Step 4: Simplify right side
    1,289.28x = 819,032.06
  5. Step 5: Solve for x
    x = 819,032.06/1,289.28
  6. Step 6: Final answer
    x = 635.26

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1.5x scale

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.