Home / 1,269.12-1,903.68-403.56

Finding the Fourth Proportional to 1,269.12, 1,903.68 and 403.56

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Solution

The fourth proportional to 1,269.12, 1,903.68 and 403.56 is: 605.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.12 : 1,903.68 = 403.56 : x
  2. Step 2: Convert to fraction form
    1,269.12/1,903.68 = 403.56/x
  3. Step 3: Cross multiply
    1,269.12x = 1,903.68 × 403.56
  4. Step 4: Simplify right side
    1,269.12x = 768,249.10
  5. Step 5: Solve for x
    x = 768,249.10/1,269.12
  6. Step 6: Final answer
    x = 605.34

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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.