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Finding the Fourth Proportional to 1,444.82, 2,161.81 and 857.67

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Solution

The fourth proportional to 1,444.82, 2,161.81 and 857.67 is: 1,283.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,444.82 : 2,161.81 = 857.67 : x
  2. Step 2: Convert to fraction form
    1,444.82/2,161.81 = 857.67/x
  3. Step 3: Cross multiply
    1,444.82x = 2,161.81 × 857.67
  4. Step 4: Simplify right side
    1,444.82x = 1,854,117.44
  5. Step 5: Solve for x
    x = 1,854,117.44/1,444.82
  6. Step 6: Final answer
    x = 1,283.28

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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.