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Finding the Fourth Proportional to 817.46, 1,128.36 and 522.73

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Solution

The fourth proportional to 817.46, 1,128.36 and 522.73 is: 721.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.46 : 1,128.36 = 522.73 : x
  2. Step 2: Convert to fraction form
    817.46/1,128.36 = 522.73/x
  3. Step 3: Cross multiply
    817.46x = 1,128.36 × 522.73
  4. Step 4: Simplify right side
    817.46x = 589,827.07
  5. Step 5: Solve for x
    x = 589,827.07/817.46
  6. Step 6: Final answer
    x = 721.53

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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.