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Finding the Fourth Proportional to 4,919.68, 7,381.28 and 1,999.68

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Solution

The fourth proportional to 4,919.68, 7,381.28 and 1,999.68 is: 3,000.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,919.68 : 7,381.28 = 1,999.68 : x
  2. Step 2: Convert to fraction form
    4,919.68/7,381.28 = 1,999.68/x
  3. Step 3: Cross multiply
    4,919.68x = 7,381.28 × 1,999.68
  4. Step 4: Simplify right side
    4,919.68x = 14,760,197.99
  5. Step 5: Solve for x
    x = 14,760,197.99/4,919.68
  6. Step 6: Final answer
    x = 3,000.24

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1.5x scale

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.