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Finding the Fourth Proportional to 1,929.68, 2,662.98 and 1,143.80

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Solution

The fourth proportional to 1,929.68, 2,662.98 and 1,143.80 is: 1,578.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.68 : 2,662.98 = 1,143.80 : x
  2. Step 2: Convert to fraction form
    1,929.68/2,662.98 = 1,143.80/x
  3. Step 3: Cross multiply
    1,929.68x = 2,662.98 × 1,143.80
  4. Step 4: Simplify right side
    1,929.68x = 3,045,916.52
  5. Step 5: Solve for x
    x = 3,045,916.52/1,929.68
  6. Step 6: Final answer
    x = 1,578.46

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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.