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Finding the Fourth Proportional to 1,643.67, 2,269.49 and 1,054.53

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Solution

The fourth proportional to 1,643.67, 2,269.49 and 1,054.53 is: 1,456.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.67 : 2,269.49 = 1,054.53 : x
  2. Step 2: Convert to fraction form
    1,643.67/2,269.49 = 1,054.53/x
  3. Step 3: Cross multiply
    1,643.67x = 2,269.49 × 1,054.53
  4. Step 4: Simplify right side
    1,643.67x = 2,393,240.02
  5. Step 5: Solve for x
    x = 2,393,240.02/1,643.67
  6. Step 6: Final answer
    x = 1,456.03

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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.