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Finding the Fourth Proportional to 3,148, 4,722.04 and 839.52

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Solution

The fourth proportional to 3,148, 4,722.04 and 839.52 is: 1,259.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,148 : 4,722.04 = 839.52 : x
  2. Step 2: Convert to fraction form
    3,148/4,722.04 = 839.52/x
  3. Step 3: Cross multiply
    3,148x = 4,722.04 × 839.52
  4. Step 4: Simplify right side
    3,148x = 3,964,247.02
  5. Step 5: Solve for x
    x = 3,964,247.02/3,148
  6. Step 6: Final answer
    x = 1,259.29

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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.