Home / 1,289.27-1,934.10-423.38

Finding the Fourth Proportional to 1,289.27, 1,934.10 and 423.38

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Solution

The fourth proportional to 1,289.27, 1,934.10 and 423.38 is: 635.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.27 : 1,934.10 = 423.38 : x
  2. Step 2: Convert to fraction form
    1,289.27/1,934.10 = 423.38/x
  3. Step 3: Cross multiply
    1,289.27x = 1,934.10 × 423.38
  4. Step 4: Simplify right side
    1,289.27x = 818,849.59
  5. Step 5: Solve for x
    x = 818,849.59/1,289.27
  6. Step 6: Final answer
    x = 635.13

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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.