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Finding the Fourth Proportional to 1,643.06, 2,267.32 and 897

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Solution

The fourth proportional to 1,643.06, 2,267.32 and 897 is: 1,237.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.06 : 2,267.32 = 897 : x
  2. Step 2: Convert to fraction form
    1,643.06/2,267.32 = 897/x
  3. Step 3: Cross multiply
    1,643.06x = 2,267.32 × 897
  4. Step 4: Simplify right side
    1,643.06x = 2,033,786.04
  5. Step 5: Solve for x
    x = 2,033,786.04/1,643.06
  6. Step 6: Final answer
    x = 1,237.80

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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.