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Finding the Fourth Proportional to 3,145.63, 4,718.43 and 805.63

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Solution

The fourth proportional to 3,145.63, 4,718.43 and 805.63 is: 1,208.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.63 : 4,718.43 = 805.63 : x
  2. Step 2: Convert to fraction form
    3,145.63/4,718.43 = 805.63/x
  3. Step 3: Cross multiply
    3,145.63x = 4,718.43 × 805.63
  4. Step 4: Simplify right side
    3,145.63x = 3,801,305.81
  5. Step 5: Solve for x
    x = 3,801,305.81/3,145.63
  6. Step 6: Final answer
    x = 1,208.44

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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.