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Finding the Fourth Proportional to 845.96, 1,258.96 and 818.96

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Solution

The fourth proportional to 845.96, 1,258.96 and 818.96 is: 1,218.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.96 : 1,258.96 = 818.96 : x
  2. Step 2: Convert to fraction form
    845.96/1,258.96 = 818.96/x
  3. Step 3: Cross multiply
    845.96x = 1,258.96 × 818.96
  4. Step 4: Simplify right side
    845.96x = 1,031,037.88
  5. Step 5: Solve for x
    x = 1,031,037.88/845.96
  6. Step 6: Final answer
    x = 1,218.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.