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Finding the Fourth Proportional to 1,906.66, 2,630.76 and 1,207.63

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Solution

The fourth proportional to 1,906.66, 2,630.76 and 1,207.63 is: 1,666.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.66 : 2,630.76 = 1,207.63 : x
  2. Step 2: Convert to fraction form
    1,906.66/2,630.76 = 1,207.63/x
  3. Step 3: Cross multiply
    1,906.66x = 2,630.76 × 1,207.63
  4. Step 4: Simplify right side
    1,906.66x = 3,176,984.70
  5. Step 5: Solve for x
    x = 3,176,984.70/1,906.66
  6. Step 6: Final answer
    x = 1,666.26

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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.