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Finding the Fourth Proportional to 845.89, 1,267.90 and 553.27

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Solution

The fourth proportional to 845.89, 1,267.90 and 553.27 is: 829.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.89 : 1,267.90 = 553.27 : x
  2. Step 2: Convert to fraction form
    845.89/1,267.90 = 553.27/x
  3. Step 3: Cross multiply
    845.89x = 1,267.90 × 553.27
  4. Step 4: Simplify right side
    845.89x = 701,491.03
  5. Step 5: Solve for x
    x = 701,491.03/845.89
  6. Step 6: Final answer
    x = 829.29

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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.