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Finding the Fourth Proportional to 845.56, 1,164.90 and 679.72

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Solution

The fourth proportional to 845.56, 1,164.90 and 679.72 is: 936.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.56 : 1,164.90 = 679.72 : x
  2. Step 2: Convert to fraction form
    845.56/1,164.90 = 679.72/x
  3. Step 3: Cross multiply
    845.56x = 1,164.90 × 679.72
  4. Step 4: Simplify right side
    845.56x = 791,805.83
  5. Step 5: Solve for x
    x = 791,805.83/845.56
  6. Step 6: Final answer
    x = 936.43

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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.