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Finding the Fourth Proportional to 1,621.91, 2,428.97 and 926.47

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Solution

The fourth proportional to 1,621.91, 2,428.97 and 926.47 is: 1,387.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.91 : 2,428.97 = 926.47 : x
  2. Step 2: Convert to fraction form
    1,621.91/2,428.97 = 926.47/x
  3. Step 3: Cross multiply
    1,621.91x = 2,428.97 × 926.47
  4. Step 4: Simplify right side
    1,621.91x = 2,250,365.52
  5. Step 5: Solve for x
    x = 2,250,365.52/1,621.91
  6. Step 6: Final answer
    x = 1,387.48

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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.