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Finding the Fourth Proportional to 933.42, 1,287.84 and 540.43

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Solution

The fourth proportional to 933.42, 1,287.84 and 540.43 is: 745.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.42 : 1,287.84 = 540.43 : x
  2. Step 2: Convert to fraction form
    933.42/1,287.84 = 540.43/x
  3. Step 3: Cross multiply
    933.42x = 1,287.84 × 540.43
  4. Step 4: Simplify right side
    933.42x = 695,987.37
  5. Step 5: Solve for x
    x = 695,987.37/933.42
  6. Step 6: Final answer
    x = 745.63

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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.