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Finding the Fourth Proportional to 829.41, 1,244.88 and 521.82

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Solution

The fourth proportional to 829.41, 1,244.88 and 521.82 is: 783.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.41 : 1,244.88 = 521.82 : x
  2. Step 2: Convert to fraction form
    829.41/1,244.88 = 521.82/x
  3. Step 3: Cross multiply
    829.41x = 1,244.88 × 521.82
  4. Step 4: Simplify right side
    829.41x = 649,603.28
  5. Step 5: Solve for x
    x = 649,603.28/829.41
  6. Step 6: Final answer
    x = 783.21

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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.