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Finding the Fourth Proportional to 996.74, 1,375.55 and 603.80

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Solution

The fourth proportional to 996.74, 1,375.55 and 603.80 is: 833.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.74 : 1,375.55 = 603.80 : x
  2. Step 2: Convert to fraction form
    996.74/1,375.55 = 603.80/x
  3. Step 3: Cross multiply
    996.74x = 1,375.55 × 603.80
  4. Step 4: Simplify right side
    996.74x = 830,557.09
  5. Step 5: Solve for x
    x = 830,557.09/996.74
  6. Step 6: Final answer
    x = 833.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.