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Finding the Fourth Proportional to 1,940.25, 2,910.28 and 553.58

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Solution

The fourth proportional to 1,940.25, 2,910.28 and 553.58 is: 830.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.25 : 2,910.28 = 553.58 : x
  2. Step 2: Convert to fraction form
    1,940.25/2,910.28 = 553.58/x
  3. Step 3: Cross multiply
    1,940.25x = 2,910.28 × 553.58
  4. Step 4: Simplify right side
    1,940.25x = 1,611,085.19
  5. Step 5: Solve for x
    x = 1,611,085.19/1,940.25
  6. Step 6: Final answer
    x = 830.35

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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.