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Finding the Fourth Proportional to 1,637.82, 2,456.64 and 405.18

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Solution

The fourth proportional to 1,637.82, 2,456.64 and 405.18 is: 607.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,637.82 : 2,456.64 = 405.18 : x
  2. Step 2: Convert to fraction form
    1,637.82/2,456.64 = 405.18/x
  3. Step 3: Cross multiply
    1,637.82x = 2,456.64 × 405.18
  4. Step 4: Simplify right side
    1,637.82x = 995,381.40
  5. Step 5: Solve for x
    x = 995,381.40/1,637.82
  6. Step 6: Final answer
    x = 607.75

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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.