Home / 1,425.12-2,138.55-604.05

Finding the Fourth Proportional to 1,425.12, 2,138.55 and 604.05

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Solution

The fourth proportional to 1,425.12, 2,138.55 and 604.05 is: 906.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.12 : 2,138.55 = 604.05 : x
  2. Step 2: Convert to fraction form
    1,425.12/2,138.55 = 604.05/x
  3. Step 3: Cross multiply
    1,425.12x = 2,138.55 × 604.05
  4. Step 4: Simplify right side
    1,425.12x = 1,291,791.13
  5. Step 5: Solve for x
    x = 1,291,791.13/1,425.12
  6. Step 6: Final answer
    x = 906.44

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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.