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Finding the Fourth Proportional to 818.43, 1,128.69 and 598.74

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Solution

The fourth proportional to 818.43, 1,128.69 and 598.74 is: 825.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.43 : 1,128.69 = 598.74 : x
  2. Step 2: Convert to fraction form
    818.43/1,128.69 = 598.74/x
  3. Step 3: Cross multiply
    818.43x = 1,128.69 × 598.74
  4. Step 4: Simplify right side
    818.43x = 675,791.85
  5. Step 5: Solve for x
    x = 675,791.85/818.43
  6. Step 6: Final answer
    x = 825.72

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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.