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Finding the Fourth Proportional to 845.88, 1,171.86 and 825.72

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Solution

The fourth proportional to 845.88, 1,171.86 and 825.72 is: 1,143.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.88 : 1,171.86 = 825.72 : x
  2. Step 2: Convert to fraction form
    845.88/1,171.86 = 825.72/x
  3. Step 3: Cross multiply
    845.88x = 1,171.86 × 825.72
  4. Step 4: Simplify right side
    845.88x = 967,628.24
  5. Step 5: Solve for x
    x = 967,628.24/845.88
  6. Step 6: Final answer
    x = 1,143.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.