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Finding the Fourth Proportional to 1,940.70, 2,910.62 and 554.01

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Solution

The fourth proportional to 1,940.70, 2,910.62 and 554.01 is: 830.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.70 : 2,910.62 = 554.01 : x
  2. Step 2: Convert to fraction form
    1,940.70/2,910.62 = 554.01/x
  3. Step 3: Cross multiply
    1,940.70x = 2,910.62 × 554.01
  4. Step 4: Simplify right side
    1,940.70x = 1,612,509.82
  5. Step 5: Solve for x
    x = 1,612,509.82/1,940.70
  6. Step 6: Final answer
    x = 830.89

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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.