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Finding the Fourth Proportional to 1,637.97, 2,455.34 and 815.01

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Solution

The fourth proportional to 1,637.97, 2,455.34 and 815.01 is: 1,221.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,637.97 : 2,455.34 = 815.01 : x
  2. Step 2: Convert to fraction form
    1,637.97/2,455.34 = 815.01/x
  3. Step 3: Cross multiply
    1,637.97x = 2,455.34 × 815.01
  4. Step 4: Simplify right side
    1,637.97x = 2,001,122.58
  5. Step 5: Solve for x
    x = 2,001,122.58/1,637.97
  6. Step 6: Final answer
    x = 1,221.71

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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.