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Finding the Fourth Proportional to 998.21, 1,495.59 and 896.76

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Solution

The fourth proportional to 998.21, 1,495.59 and 896.76 is: 1,343.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.21 : 1,495.59 = 896.76 : x
  2. Step 2: Convert to fraction form
    998.21/1,495.59 = 896.76/x
  3. Step 3: Cross multiply
    998.21x = 1,495.59 × 896.76
  4. Step 4: Simplify right side
    998.21x = 1,341,185.29
  5. Step 5: Solve for x
    x = 1,341,185.29/998.21
  6. Step 6: Final answer
    x = 1,343.60

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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.