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Finding the Fourth Proportional to 845.12, 1,269 and 803.96

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Solution

The fourth proportional to 845.12, 1,269 and 803.96 is: 1,207.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.12 : 1,269 = 803.96 : x
  2. Step 2: Convert to fraction form
    845.12/1,269 = 803.96/x
  3. Step 3: Cross multiply
    845.12x = 1,269 × 803.96
  4. Step 4: Simplify right side
    845.12x = 1,020,225.24
  5. Step 5: Solve for x
    x = 1,020,225.24/845.12
  6. Step 6: Final answer
    x = 1,207.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.