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Finding the Fourth Proportional to 1,922.40, 2,649.84 and 1,836

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Solution

The fourth proportional to 1,922.40, 2,649.84 and 1,836 is: 2,530.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,922.40 : 2,649.84 = 1,836 : x
  2. Step 2: Convert to fraction form
    1,922.40/2,649.84 = 1,836/x
  3. Step 3: Cross multiply
    1,922.40x = 2,649.84 × 1,836
  4. Step 4: Simplify right side
    1,922.40x = 4,865,106.24
  5. Step 5: Solve for x
    x = 4,865,106.24/1,922.40
  6. Step 6: Final answer
    x = 2,530.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.