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Finding the Fourth Proportional to 543,369.80, 815,669.10 and 321,878.60

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Solution

The fourth proportional to 543,369.80, 815,669.10 and 321,878.60 is: 483,181.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,369.80 : 815,669.10 = 321,878.60 : x
  2. Step 2: Convert to fraction form
    543,369.80/815,669.10 = 321,878.60/x
  3. Step 3: Cross multiply
    543,369.80x = 815,669.10 × 321,878.60
  4. Step 4: Simplify right side
    543,369.80x = 262,546,427,971.26
  5. Step 5: Solve for x
    x = 262,546,427,971.26/543,369.80
  6. Step 6: Final answer
    x = 483,181.86

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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.