Home / 1,068.18-1,603.19-419.37

Finding the Fourth Proportional to 1,068.18, 1,603.19 and 419.37

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Solution

The fourth proportional to 1,068.18, 1,603.19 and 419.37 is: 629.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,068.18 : 1,603.19 = 419.37 : x
  2. Step 2: Convert to fraction form
    1,068.18/1,603.19 = 419.37/x
  3. Step 3: Cross multiply
    1,068.18x = 1,603.19 × 419.37
  4. Step 4: Simplify right side
    1,068.18x = 672,327.69
  5. Step 5: Solve for x
    x = 672,327.69/1,068.18
  6. Step 6: Final answer
    x = 629.41

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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.