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Finding the Fourth Proportional to 4,649.92, 6,974.89 and 1,139.94

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Solution

The fourth proportional to 4,649.92, 6,974.89 and 1,139.94 is: 1,709.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,649.92 : 6,974.89 = 1,139.94 : x
  2. Step 2: Convert to fraction form
    4,649.92/6,974.89 = 1,139.94/x
  3. Step 3: Cross multiply
    4,649.92x = 6,974.89 × 1,139.94
  4. Step 4: Simplify right side
    4,649.92x = 7,950,976.39
  5. Step 5: Solve for x
    x = 7,950,976.39/4,649.92
  6. Step 6: Final answer
    x = 1,709.92

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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.