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Finding the Fourth Proportional to 1,331.76, 1,998.31 and 898

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Solution

The fourth proportional to 1,331.76, 1,998.31 and 898 is: 1,347.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.76 : 1,998.31 = 898 : x
  2. Step 2: Convert to fraction form
    1,331.76/1,998.31 = 898/x
  3. Step 3: Cross multiply
    1,331.76x = 1,998.31 × 898
  4. Step 4: Simplify right side
    1,331.76x = 1,794,480.14
  5. Step 5: Solve for x
    x = 1,794,480.14/1,331.76
  6. Step 6: Final answer
    x = 1,347.46

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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.