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Finding the Fourth Proportional to 388,956, 536,745.84 and 219,180

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Solution

The fourth proportional to 388,956, 536,745.84 and 219,180 is: 302,460.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,956 : 536,745.84 = 219,180 : x
  2. Step 2: Convert to fraction form
    388,956/536,745.84 = 219,180/x
  3. Step 3: Cross multiply
    388,956x = 536,745.84 × 219,180
  4. Step 4: Simplify right side
    388,956x = 117,643,953,211.20
  5. Step 5: Solve for x
    x = 117,643,953,211.20/388,956
  6. Step 6: Final answer
    x = 302,460.83

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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.