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Finding the Fourth Proportional to 3,148.57, 4,722.76 and 808.48

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Solution

The fourth proportional to 3,148.57, 4,722.76 and 808.48 is: 1,212.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,148.57 : 4,722.76 = 808.48 : x
  2. Step 2: Convert to fraction form
    3,148.57/4,722.76 = 808.48/x
  3. Step 3: Cross multiply
    3,148.57x = 4,722.76 × 808.48
  4. Step 4: Simplify right side
    3,148.57x = 3,818,257.00
  5. Step 5: Solve for x
    x = 3,818,257.00/3,148.57
  6. Step 6: Final answer
    x = 1,212.70

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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.