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Finding the Fourth Proportional to 1,756.41, 2,631.92 and 891.33

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Solution

The fourth proportional to 1,756.41, 2,631.92 and 891.33 is: 1,335.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,756.41 : 2,631.92 = 891.33 : x
  2. Step 2: Convert to fraction form
    1,756.41/2,631.92 = 891.33/x
  3. Step 3: Cross multiply
    1,756.41x = 2,631.92 × 891.33
  4. Step 4: Simplify right side
    1,756.41x = 2,345,904.80
  5. Step 5: Solve for x
    x = 2,345,904.80/1,756.41
  6. Step 6: Final answer
    x = 1,335.62

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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.