Home / 1,425.19-2,138.10-451.30

Finding the Fourth Proportional to 1,425.19, 2,138.10 and 451.30

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Solution

The fourth proportional to 1,425.19, 2,138.10 and 451.30 is: 677.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.19 : 2,138.10 = 451.30 : x
  2. Step 2: Convert to fraction form
    1,425.19/2,138.10 = 451.30/x
  3. Step 3: Cross multiply
    1,425.19x = 2,138.10 × 451.30
  4. Step 4: Simplify right side
    1,425.19x = 964,924.53
  5. Step 5: Solve for x
    x = 964,924.53/1,425.19
  6. Step 6: Final answer
    x = 677.05

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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.