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Finding the Fourth Proportional to 1,938.47, 2,906.06 and 842.00

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Solution

The fourth proportional to 1,938.47, 2,906.06 and 842.00 is: 1,262.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.47 : 2,906.06 = 842.00 : x
  2. Step 2: Convert to fraction form
    1,938.47/2,906.06 = 842.00/x
  3. Step 3: Cross multiply
    1,938.47x = 2,906.06 × 842.00
  4. Step 4: Simplify right side
    1,938.47x = 2,446,905.58
  5. Step 5: Solve for x
    x = 2,446,905.58/1,938.47
  6. Step 6: Final answer
    x = 1,262.29

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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.