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Finding the Fourth Proportional to 845.22, 1,164.90 and 648.38

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Solution

The fourth proportional to 845.22, 1,164.90 and 648.38 is: 893.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.22 : 1,164.90 = 648.38 : x
  2. Step 2: Convert to fraction form
    845.22/1,164.90 = 648.38/x
  3. Step 3: Cross multiply
    845.22x = 1,164.90 × 648.38
  4. Step 4: Simplify right side
    845.22x = 755,297.86
  5. Step 5: Solve for x
    x = 755,297.86/845.22
  6. Step 6: Final answer
    x = 893.61

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1.5x scale

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.