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Finding the Fourth Proportional to 2,154.64, 2,973.31 and 1,258.43

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Solution

The fourth proportional to 2,154.64, 2,973.31 and 1,258.43 is: 1,736.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.64 : 2,973.31 = 1,258.43 : x
  2. Step 2: Convert to fraction form
    2,154.64/2,973.31 = 1,258.43/x
  3. Step 3: Cross multiply
    2,154.64x = 2,973.31 × 1,258.43
  4. Step 4: Simplify right side
    2,154.64x = 3,741,688.78
  5. Step 5: Solve for x
    x = 3,741,688.78/2,154.64
  6. Step 6: Final answer
    x = 1,736.57

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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.