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Finding the Fourth Proportional to 1,971.92, 2,972.84 and 1,866.08

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Solution

The fourth proportional to 1,971.92, 2,972.84 and 1,866.08 is: 2,813.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.92 : 2,972.84 = 1,866.08 : x
  2. Step 2: Convert to fraction form
    1,971.92/2,972.84 = 1,866.08/x
  3. Step 3: Cross multiply
    1,971.92x = 2,972.84 × 1,866.08
  4. Step 4: Simplify right side
    1,971.92x = 5,547,557.27
  5. Step 5: Solve for x
    x = 5,547,557.27/1,971.92
  6. Step 6: Final answer
    x = 2,813.28

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.