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Finding the Fourth Proportional to 1,637.91, 2,456.85 and 405.33

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Solution

The fourth proportional to 1,637.91, 2,456.85 and 405.33 is: 607.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,637.91 : 2,456.85 = 405.33 : x
  2. Step 2: Convert to fraction form
    1,637.91/2,456.85 = 405.33/x
  3. Step 3: Cross multiply
    1,637.91x = 2,456.85 × 405.33
  4. Step 4: Simplify right side
    1,637.91x = 995,835.01
  5. Step 5: Solve for x
    x = 995,835.01/1,637.91
  6. Step 6: Final answer
    x = 607.99

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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.