Home / 1,425.32-2,138.25-451.34

Finding the Fourth Proportional to 1,425.32, 2,138.25 and 451.34

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Solution

The fourth proportional to 1,425.32, 2,138.25 and 451.34 is: 677.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.32 : 2,138.25 = 451.34 : x
  2. Step 2: Convert to fraction form
    1,425.32/2,138.25 = 451.34/x
  3. Step 3: Cross multiply
    1,425.32x = 2,138.25 × 451.34
  4. Step 4: Simplify right side
    1,425.32x = 965,077.76
  5. Step 5: Solve for x
    x = 965,077.76/1,425.32
  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.