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Finding the Fourth Proportional to 3,402.78, 4,696.08 and 1,890.42

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Solution

The fourth proportional to 3,402.78, 4,696.08 and 1,890.42 is: 2,608.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,402.78 : 4,696.08 = 1,890.42 : x
  2. Step 2: Convert to fraction form
    3,402.78/4,696.08 = 1,890.42/x
  3. Step 3: Cross multiply
    3,402.78x = 4,696.08 × 1,890.42
  4. Step 4: Simplify right side
    3,402.78x = 8,877,563.55
  5. Step 5: Solve for x
    x = 8,877,563.55/3,402.78
  6. Step 6: Final answer
    x = 2,608.91

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1.5x scale

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.