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Finding the Fourth Proportional to 1,168.26, 1,752.63 and 388.22

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Solution

The fourth proportional to 1,168.26, 1,752.63 and 388.22 is: 582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.26 : 1,752.63 = 388.22 : x
  2. Step 2: Convert to fraction form
    1,168.26/1,752.63 = 388.22/x
  3. Step 3: Cross multiply
    1,168.26x = 1,752.63 × 388.22
  4. Step 4: Simplify right side
    1,168.26x = 680,397.26
  5. Step 5: Solve for x
    x = 680,397.26/1,168.26
  6. Step 6: Final answer
    x = 582.40

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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.