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Finding the Fourth Proportional to 221,459.70, 332,189.55 and 212,711.70

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Solution

The fourth proportional to 221,459.70, 332,189.55 and 212,711.70 is: 319,067.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,459.70 : 332,189.55 = 212,711.70 : x
  2. Step 2: Convert to fraction form
    221,459.70/332,189.55 = 212,711.70/x
  3. Step 3: Cross multiply
    221,459.70x = 332,189.55 × 212,711.70
  4. Step 4: Simplify right side
    221,459.70x = 70,660,603,902.74
  5. Step 5: Solve for x
    x = 70,660,603,902.74/221,459.70
  6. Step 6: Final answer
    x = 319,067.55

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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.