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Finding the Fourth Proportional to 1,263.99, 1,743.82 and 933.21

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Solution

The fourth proportional to 1,263.99, 1,743.82 and 933.21 is: 1,287.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.99 : 1,743.82 = 933.21 : x
  2. Step 2: Convert to fraction form
    1,263.99/1,743.82 = 933.21/x
  3. Step 3: Cross multiply
    1,263.99x = 1,743.82 × 933.21
  4. Step 4: Simplify right side
    1,263.99x = 1,627,350.26
  5. Step 5: Solve for x
    x = 1,627,350.26/1,263.99
  6. Step 6: Final answer
    x = 1,287.47

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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.