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Finding the Fourth Proportional to 1,425.56, 2,137.62 and 488.20

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Solution

The fourth proportional to 1,425.56, 2,137.62 and 488.20 is: 732.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.56 : 2,137.62 = 488.20 : x
  2. Step 2: Convert to fraction form
    1,425.56/2,137.62 = 488.20/x
  3. Step 3: Cross multiply
    1,425.56x = 2,137.62 × 488.20
  4. Step 4: Simplify right side
    1,425.56x = 1,043,586.08
  5. Step 5: Solve for x
    x = 1,043,586.08/1,425.56
  6. Step 6: Final answer
    x = 732.05

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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.