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Finding the Fourth Proportional to 1,940.17, 2,910.35 and 553.70

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Solution

The fourth proportional to 1,940.17, 2,910.35 and 553.70 is: 830.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.17 : 2,910.35 = 553.70 : x
  2. Step 2: Convert to fraction form
    1,940.17/2,910.35 = 553.70/x
  3. Step 3: Cross multiply
    1,940.17x = 2,910.35 × 553.70
  4. Step 4: Simplify right side
    1,940.17x = 1,611,471.80
  5. Step 5: Solve for x
    x = 1,611,471.80/1,940.17
  6. Step 6: Final answer
    x = 830.58

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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.