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Finding the Fourth Proportional to 846.55, 1,269.70 and 298.66

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Solution

The fourth proportional to 846.55, 1,269.70 and 298.66 is: 447.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.55 : 1,269.70 = 298.66 : x
  2. Step 2: Convert to fraction form
    846.55/1,269.70 = 298.66/x
  3. Step 3: Cross multiply
    846.55x = 1,269.70 × 298.66
  4. Step 4: Simplify right side
    846.55x = 379,202.25
  5. Step 5: Solve for x
    x = 379,202.25/846.55
  6. Step 6: Final answer
    x = 447.94

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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.