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Finding the Fourth Proportional to 1,642.89, 2,267.15 and 896.84

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Solution

The fourth proportional to 1,642.89, 2,267.15 and 896.84 is: 1,237.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.89 : 2,267.15 = 896.84 : x
  2. Step 2: Convert to fraction form
    1,642.89/2,267.15 = 896.84/x
  3. Step 3: Cross multiply
    1,642.89x = 2,267.15 × 896.84
  4. Step 4: Simplify right side
    1,642.89x = 2,033,270.81
  5. Step 5: Solve for x
    x = 2,033,270.81/1,642.89
  6. Step 6: Final answer
    x = 1,237.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.