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Finding the Fourth Proportional to 1,762.80, 2,643.99 and 722.08

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Solution

The fourth proportional to 1,762.80, 2,643.99 and 722.08 is: 1,083.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,762.80 : 2,643.99 = 722.08 : x
  2. Step 2: Convert to fraction form
    1,762.80/2,643.99 = 722.08/x
  3. Step 3: Cross multiply
    1,762.80x = 2,643.99 × 722.08
  4. Step 4: Simplify right side
    1,762.80x = 1,909,172.30
  5. Step 5: Solve for x
    x = 1,909,172.30/1,762.80
  6. Step 6: Final answer
    x = 1,083.03

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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.