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Finding the Fourth Proportional to 797.40, 1,190.40 and 674.28

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Solution

The fourth proportional to 797.40, 1,190.40 and 674.28 is: 1,006.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.40 : 1,190.40 = 674.28 : x
  2. Step 2: Convert to fraction form
    797.40/1,190.40 = 674.28/x
  3. Step 3: Cross multiply
    797.40x = 1,190.40 × 674.28
  4. Step 4: Simplify right side
    797.40x = 802,662.91
  5. Step 5: Solve for x
    x = 802,662.91/797.40
  6. Step 6: Final answer
    x = 1,006.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.