Home / 1,425.14-2,137.71-1,138.40

Finding the Fourth Proportional to 1,425.14, 2,137.71 and 1,138.40

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Solution

The fourth proportional to 1,425.14, 2,137.71 and 1,138.40 is: 1,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.14 : 2,137.71 = 1,138.40 : x
  2. Step 2: Convert to fraction form
    1,425.14/2,137.71 = 1,138.40/x
  3. Step 3: Cross multiply
    1,425.14x = 2,137.71 × 1,138.40
  4. Step 4: Simplify right side
    1,425.14x = 2,433,569.06
  5. Step 5: Solve for x
    x = 2,433,569.06/1,425.14
  6. Step 6: Final answer
    x = 1,707.60

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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.