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Finding the Fourth Proportional to 2,143.71, 2,955.15 and 1,512.18

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Solution

The fourth proportional to 2,143.71, 2,955.15 and 1,512.18 is: 2,084.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.71 : 2,955.15 = 1,512.18 : x
  2. Step 2: Convert to fraction form
    2,143.71/2,955.15 = 1,512.18/x
  3. Step 3: Cross multiply
    2,143.71x = 2,955.15 × 1,512.18
  4. Step 4: Simplify right side
    2,143.71x = 4,468,718.73
  5. Step 5: Solve for x
    x = 4,468,718.73/2,143.71
  6. Step 6: Final answer
    x = 2,084.57

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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.