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Finding the Fourth Proportional to 801.84, 1,202.76 and 680.88

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Solution

The fourth proportional to 801.84, 1,202.76 and 680.88 is: 1,021.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.84 : 1,202.76 = 680.88 : x
  2. Step 2: Convert to fraction form
    801.84/1,202.76 = 680.88/x
  3. Step 3: Cross multiply
    801.84x = 1,202.76 × 680.88
  4. Step 4: Simplify right side
    801.84x = 818,935.23
  5. Step 5: Solve for x
    x = 818,935.23/801.84
  6. Step 6: Final answer
    x = 1,021.32

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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.