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Finding the Fourth Proportional to 1,661.79, 2,493.41 and 891.39

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Solution

The fourth proportional to 1,661.79, 2,493.41 and 891.39 is: 1,337.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.79 : 2,493.41 = 891.39 : x
  2. Step 2: Convert to fraction form
    1,661.79/2,493.41 = 891.39/x
  3. Step 3: Cross multiply
    1,661.79x = 2,493.41 × 891.39
  4. Step 4: Simplify right side
    1,661.79x = 2,222,596.28
  5. Step 5: Solve for x
    x = 2,222,596.28/1,661.79
  6. Step 6: Final answer
    x = 1,337.47

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.