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Finding the Fourth Proportional to 896.05, 1,342.86 and 665.81

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Solution

The fourth proportional to 896.05, 1,342.86 and 665.81 is: 997.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.05 : 1,342.86 = 665.81 : x
  2. Step 2: Convert to fraction form
    896.05/1,342.86 = 665.81/x
  3. Step 3: Cross multiply
    896.05x = 1,342.86 × 665.81
  4. Step 4: Simplify right side
    896.05x = 894,080.41
  5. Step 5: Solve for x
    x = 894,080.41/896.05
  6. Step 6: Final answer
    x = 997.80

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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.