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Finding the Fourth Proportional to 884.64, 1,220.16 and 797.28

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Solution

The fourth proportional to 884.64, 1,220.16 and 797.28 is: 1,099.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.64 : 1,220.16 = 797.28 : x
  2. Step 2: Convert to fraction form
    884.64/1,220.16 = 797.28/x
  3. Step 3: Cross multiply
    884.64x = 1,220.16 × 797.28
  4. Step 4: Simplify right side
    884.64x = 972,809.16
  5. Step 5: Solve for x
    x = 972,809.16/884.64
  6. Step 6: Final answer
    x = 1,099.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.