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Finding the Fourth Proportional to 1,425.41, 2,138.20 and 603.80

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Solution

The fourth proportional to 1,425.41, 2,138.20 and 603.80 is: 905.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.41 : 2,138.20 = 603.80 : x
  2. Step 2: Convert to fraction form
    1,425.41/2,138.20 = 603.80/x
  3. Step 3: Cross multiply
    1,425.41x = 2,138.20 × 603.80
  4. Step 4: Simplify right side
    1,425.41x = 1,291,032.96
  5. Step 5: Solve for x
    x = 1,291,032.96/1,425.41
  6. Step 6: Final answer
    x = 905.73

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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.