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Finding the Fourth Proportional to 1,219.50, 1,828.04 and 671.94

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Solution

The fourth proportional to 1,219.50, 1,828.04 and 671.94 is: 1,007.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.50 : 1,828.04 = 671.94 : x
  2. Step 2: Convert to fraction form
    1,219.50/1,828.04 = 671.94/x
  3. Step 3: Cross multiply
    1,219.50x = 1,828.04 × 671.94
  4. Step 4: Simplify right side
    1,219.50x = 1,228,329.84
  5. Step 5: Solve for x
    x = 1,228,329.84/1,219.50
  6. Step 6: Final answer
    x = 1,007.24

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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.