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Finding the Fourth Proportional to 1,929.72, 2,893.98 and 1,283.88

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Solution

The fourth proportional to 1,929.72, 2,893.98 and 1,283.88 is: 1,925.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.72 : 2,893.98 = 1,283.88 : x
  2. Step 2: Convert to fraction form
    1,929.72/2,893.98 = 1,283.88/x
  3. Step 3: Cross multiply
    1,929.72x = 2,893.98 × 1,283.88
  4. Step 4: Simplify right side
    1,929.72x = 3,715,523.04
  5. Step 5: Solve for x
    x = 3,715,523.04/1,929.72
  6. Step 6: Final answer
    x = 1,925.42

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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.