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Finding the Fourth Proportional to 354,626.40, 531,939.60 and 221,656.80

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Solution

The fourth proportional to 354,626.40, 531,939.60 and 221,656.80 is: 332,485.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,626.40 : 531,939.60 = 221,656.80 : x
  2. Step 2: Convert to fraction form
    354,626.40/531,939.60 = 221,656.80/x
  3. Step 3: Cross multiply
    354,626.40x = 531,939.60 × 221,656.80
  4. Step 4: Simplify right side
    354,626.40x = 117,908,029,529.28
  5. Step 5: Solve for x
    x = 117,908,029,529.28/354,626.40
  6. Step 6: Final answer
    x = 332,485.20

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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.