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Finding the Fourth Proportional to 1,916.57, 2,873.78 and 666.59

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Solution

The fourth proportional to 1,916.57, 2,873.78 and 666.59 is: 999.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.57 : 2,873.78 = 666.59 : x
  2. Step 2: Convert to fraction form
    1,916.57/2,873.78 = 666.59/x
  3. Step 3: Cross multiply
    1,916.57x = 2,873.78 × 666.59
  4. Step 4: Simplify right side
    1,916.57x = 1,915,629.68
  5. Step 5: Solve for x
    x = 1,915,629.68/1,916.57
  6. Step 6: Final answer
    x = 999.51

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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.