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Finding the Fourth Proportional to 2,989.92, 4,484.88 and 798.72

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Solution

The fourth proportional to 2,989.92, 4,484.88 and 798.72 is: 1,198.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.92 : 4,484.88 = 798.72 : x
  2. Step 2: Convert to fraction form
    2,989.92/4,484.88 = 798.72/x
  3. Step 3: Cross multiply
    2,989.92x = 4,484.88 × 798.72
  4. Step 4: Simplify right side
    2,989.92x = 3,582,163.35
  5. Step 5: Solve for x
    x = 3,582,163.35/2,989.92
  6. Step 6: Final answer
    x = 1,198.08

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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.