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Finding the Fourth Proportional to 2,143.29, 2,957.21 and 1,258.92

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Solution

The fourth proportional to 2,143.29, 2,957.21 and 1,258.92 is: 1,737.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.29 : 2,957.21 = 1,258.92 : x
  2. Step 2: Convert to fraction form
    2,143.29/2,957.21 = 1,258.92/x
  3. Step 3: Cross multiply
    2,143.29x = 2,957.21 × 1,258.92
  4. Step 4: Simplify right side
    2,143.29x = 3,722,884.52
  5. Step 5: Solve for x
    x = 3,722,884.52/2,143.29
  6. Step 6: Final answer
    x = 1,737.00

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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.