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Finding the Fourth Proportional to 389,013.78, 583,520.62 and 122,961.10

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Solution

The fourth proportional to 389,013.78, 583,520.62 and 122,961.10 is: 184,441.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,013.78 : 583,520.62 = 122,961.10 : x
  2. Step 2: Convert to fraction form
    389,013.78/583,520.62 = 122,961.10/x
  3. Step 3: Cross multiply
    389,013.78x = 583,520.62 × 122,961.10
  4. Step 4: Simplify right side
    389,013.78x = 71,750,337,307.88
  5. Step 5: Solve for x
    x = 71,750,337,307.88/389,013.78
  6. Step 6: Final answer
    x = 184,441.63

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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.