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Finding the Fourth Proportional to 996.45, 1,374.87 and 603.39

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Solution

The fourth proportional to 996.45, 1,374.87 and 603.39 is: 832.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.45 : 1,374.87 = 603.39 : x
  2. Step 2: Convert to fraction form
    996.45/1,374.87 = 603.39/x
  3. Step 3: Cross multiply
    996.45x = 1,374.87 × 603.39
  4. Step 4: Simplify right side
    996.45x = 829,582.81
  5. Step 5: Solve for x
    x = 829,582.81/996.45
  6. Step 6: Final answer
    x = 832.54

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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.