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Finding the Fourth Proportional to 845.82, 1,167.21 and 820.98

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Solution

The fourth proportional to 845.82, 1,167.21 and 820.98 is: 1,132.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.82 : 1,167.21 = 820.98 : x
  2. Step 2: Convert to fraction form
    845.82/1,167.21 = 820.98/x
  3. Step 3: Cross multiply
    845.82x = 1,167.21 × 820.98
  4. Step 4: Simplify right side
    845.82x = 958,256.07
  5. Step 5: Solve for x
    x = 958,256.07/845.82
  6. Step 6: Final answer
    x = 1,132.93

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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.