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Finding the Fourth Proportional to 829.89, 1,145.21 and 535.23

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Solution

The fourth proportional to 829.89, 1,145.21 and 535.23 is: 738.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.89 : 1,145.21 = 535.23 : x
  2. Step 2: Convert to fraction form
    829.89/1,145.21 = 535.23/x
  3. Step 3: Cross multiply
    829.89x = 1,145.21 × 535.23
  4. Step 4: Simplify right side
    829.89x = 612,948.07
  5. Step 5: Solve for x
    x = 612,948.07/829.89
  6. Step 6: Final answer
    x = 738.59

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Double scale
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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.