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Finding the Fourth Proportional to 914.97, 1,369.86 and 828.48

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Solution

The fourth proportional to 914.97, 1,369.86 and 828.48 is: 1,240.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.97 : 1,369.86 = 828.48 : x
  2. Step 2: Convert to fraction form
    914.97/1,369.86 = 828.48/x
  3. Step 3: Cross multiply
    914.97x = 1,369.86 × 828.48
  4. Step 4: Simplify right side
    914.97x = 1,134,901.61
  5. Step 5: Solve for x
    x = 1,134,901.61/914.97
  6. Step 6: Final answer
    x = 1,240.37

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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.