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Finding the Fourth Proportional to 2,643.54, 3,967.77 and 1,345.98

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Solution

The fourth proportional to 2,643.54, 3,967.77 and 1,345.98 is: 2,020.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.54 : 3,967.77 = 1,345.98 : x
  2. Step 2: Convert to fraction form
    2,643.54/3,967.77 = 1,345.98/x
  3. Step 3: Cross multiply
    2,643.54x = 3,967.77 × 1,345.98
  4. Step 4: Simplify right side
    2,643.54x = 5,340,539.06
  5. Step 5: Solve for x
    x = 5,340,539.06/2,643.54
  6. Step 6: Final answer
    x = 2,020.22

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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.