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Finding the Fourth Proportional to 4,950, 7,426.80 and 1,872

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Solution

The fourth proportional to 4,950, 7,426.80 and 1,872 is: 2,808.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,950 : 7,426.80 = 1,872 : x
  2. Step 2: Convert to fraction form
    4,950/7,426.80 = 1,872/x
  3. Step 3: Cross multiply
    4,950x = 7,426.80 × 1,872
  4. Step 4: Simplify right side
    4,950x = 13,902,969.60
  5. Step 5: Solve for x
    x = 13,902,969.60/4,950
  6. Step 6: Final answer
    x = 2,808.68

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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.