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Finding the Fourth Proportional to 1,906.56, 2,858.40 and 751.68

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Solution

The fourth proportional to 1,906.56, 2,858.40 and 751.68 is: 1,126.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.56 : 2,858.40 = 751.68 : x
  2. Step 2: Convert to fraction form
    1,906.56/2,858.40 = 751.68/x
  3. Step 3: Cross multiply
    1,906.56x = 2,858.40 × 751.68
  4. Step 4: Simplify right side
    1,906.56x = 2,148,602.11
  5. Step 5: Solve for x
    x = 2,148,602.11/1,906.56
  6. Step 6: Final answer
    x = 1,126.95

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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.