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Finding the Fourth Proportional to 1,604.56, 2,213.21 and 1,207.25

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Solution

The fourth proportional to 1,604.56, 2,213.21 and 1,207.25 is: 1,665.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,604.56 : 2,213.21 = 1,207.25 : x
  2. Step 2: Convert to fraction form
    1,604.56/2,213.21 = 1,207.25/x
  3. Step 3: Cross multiply
    1,604.56x = 2,213.21 × 1,207.25
  4. Step 4: Simplify right side
    1,604.56x = 2,671,897.27
  5. Step 5: Solve for x
    x = 2,671,897.27/1,604.56
  6. Step 6: Final answer
    x = 1,665.19

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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.