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Finding the Fourth Proportional to 1,615.23, 2,421.95 and 791.73

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Solution

The fourth proportional to 1,615.23, 2,421.95 and 791.73 is: 1,187.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.23 : 2,421.95 = 791.73 : x
  2. Step 2: Convert to fraction form
    1,615.23/2,421.95 = 791.73/x
  3. Step 3: Cross multiply
    1,615.23x = 2,421.95 × 791.73
  4. Step 4: Simplify right side
    1,615.23x = 1,917,526.51
  5. Step 5: Solve for x
    x = 1,917,526.51/1,615.23
  6. Step 6: Final answer
    x = 1,187.15

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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.