Home / 1,425.29-2,138.13-451.40

Finding the Fourth Proportional to 1,425.29, 2,138.13 and 451.40

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Solution

The fourth proportional to 1,425.29, 2,138.13 and 451.40 is: 677.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.29 : 2,138.13 = 451.40 : x
  2. Step 2: Convert to fraction form
    1,425.29/2,138.13 = 451.40/x
  3. Step 3: Cross multiply
    1,425.29x = 2,138.13 × 451.40
  4. Step 4: Simplify right side
    1,425.29x = 965,141.19
  5. Step 5: Solve for x
    x = 965,141.19/1,425.29
  6. Step 6: Final answer
    x = 677.16

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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.