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Finding the Fourth Proportional to 1,425.24, 2,138.24 and 451.32

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Solution

The fourth proportional to 1,425.24, 2,138.24 and 451.32 is: 677.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.24 : 2,138.24 = 451.32 : x
  2. Step 2: Convert to fraction form
    1,425.24/2,138.24 = 451.32/x
  3. Step 3: Cross multiply
    1,425.24x = 2,138.24 × 451.32
  4. Step 4: Simplify right side
    1,425.24x = 965,030.48
  5. Step 5: Solve for x
    x = 965,030.48/1,425.24
  6. Step 6: Final answer
    x = 677.10

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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.