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Finding the Fourth Proportional to 850.83, 1,275.22 and 388.14

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Solution

The fourth proportional to 850.83, 1,275.22 and 388.14 is: 581.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.83 : 1,275.22 = 388.14 : x
  2. Step 2: Convert to fraction form
    850.83/1,275.22 = 388.14/x
  3. Step 3: Cross multiply
    850.83x = 1,275.22 × 388.14
  4. Step 4: Simplify right side
    850.83x = 494,963.89
  5. Step 5: Solve for x
    x = 494,963.89/850.83
  6. Step 6: Final answer
    x = 581.74

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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.