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Finding the Fourth Proportional to 389,554.80, 584,258.39 and 136,775.88

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Solution

The fourth proportional to 389,554.80, 584,258.39 and 136,775.88 is: 205,137.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,554.80 : 584,258.39 = 136,775.88 : x
  2. Step 2: Convert to fraction form
    389,554.80/584,258.39 = 136,775.88/x
  3. Step 3: Cross multiply
    389,554.80x = 584,258.39 × 136,775.88
  4. Step 4: Simplify right side
    389,554.80x = 79,912,454,755.75
  5. Step 5: Solve for x
    x = 79,912,454,755.75/389,554.80
  6. Step 6: Final answer
    x = 205,137.90

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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.