Home / 1,946.79-2,921.66-1,428.11

Finding the Fourth Proportional to 1,946.79, 2,921.66 and 1,428.11

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Solution

The fourth proportional to 1,946.79, 2,921.66 and 1,428.11 is: 2,143.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.79 : 2,921.66 = 1,428.11 : x
  2. Step 2: Convert to fraction form
    1,946.79/2,921.66 = 1,428.11/x
  3. Step 3: Cross multiply
    1,946.79x = 2,921.66 × 1,428.11
  4. Step 4: Simplify right side
    1,946.79x = 4,172,440.82
  5. Step 5: Solve for x
    x = 4,172,440.82/1,946.79
  6. Step 6: Final answer
    x = 2,143.24

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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.