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Finding the Fourth Proportional to 859,603.70, 1,289,405.55 and 219,906.20

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Solution

The fourth proportional to 859,603.70, 1,289,405.55 and 219,906.20 is: 329,859.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,603.70 : 1,289,405.55 = 219,906.20 : x
  2. Step 2: Convert to fraction form
    859,603.70/1,289,405.55 = 219,906.20/x
  3. Step 3: Cross multiply
    859,603.70x = 1,289,405.55 × 219,906.20
  4. Step 4: Simplify right side
    859,603.70x = 283,548,274,759.41
  5. Step 5: Solve for x
    x = 283,548,274,759.41/859,603.70
  6. Step 6: Final answer
    x = 329,859.30

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1.5x scale

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.