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Finding the Fourth Proportional to 218,145.60, 305,611.20 and 218,145.60

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Solution

The fourth proportional to 218,145.60, 305,611.20 and 218,145.60 is: 305,611.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,145.60 : 305,611.20 = 218,145.60 : x
  2. Step 2: Convert to fraction form
    218,145.60/305,611.20 = 218,145.60/x
  3. Step 3: Cross multiply
    218,145.60x = 305,611.20 × 218,145.60
  4. Step 4: Simplify right side
    218,145.60x = 66,667,738,590.72
  5. Step 5: Solve for x
    x = 66,667,738,590.72/218,145.60
  6. Step 6: Final answer
    x = 305,611.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.