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Finding the Fourth Proportional to 846.28, 1,269.28 and 269

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Solution

The fourth proportional to 846.28, 1,269.28 and 269 is: 403.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.28 : 1,269.28 = 269 : x
  2. Step 2: Convert to fraction form
    846.28/1,269.28 = 269/x
  3. Step 3: Cross multiply
    846.28x = 1,269.28 × 269
  4. Step 4: Simplify right side
    846.28x = 341,436.32
  5. Step 5: Solve for x
    x = 341,436.32/846.28
  6. Step 6: Final answer
    x = 403.46

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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.