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Finding the Fourth Proportional to 389,113.88, 536,985.36 and 219,348

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Solution

The fourth proportional to 389,113.88, 536,985.36 and 219,348 is: 302,704.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,113.88 : 536,985.36 = 219,348 : x
  2. Step 2: Convert to fraction form
    389,113.88/536,985.36 = 219,348/x
  3. Step 3: Cross multiply
    389,113.88x = 536,985.36 × 219,348
  4. Step 4: Simplify right side
    389,113.88x = 117,786,664,745.28
  5. Step 5: Solve for x
    x = 117,786,664,745.28/389,113.88
  6. Step 6: Final answer
    x = 302,704.87

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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.