Home / 2,154.38-2,974.43-1,681.45

Finding the Fourth Proportional to 2,154.38, 2,974.43 and 1,681.45

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Solution

The fourth proportional to 2,154.38, 2,974.43 and 1,681.45 is: 2,321.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.38 : 2,974.43 = 1,681.45 : x
  2. Step 2: Convert to fraction form
    2,154.38/2,974.43 = 1,681.45/x
  3. Step 3: Cross multiply
    2,154.38x = 2,974.43 × 1,681.45
  4. Step 4: Simplify right side
    2,154.38x = 5,001,352.09
  5. Step 5: Solve for x
    x = 5,001,352.09/2,154.38
  6. Step 6: Final answer
    x = 2,321.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.