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Finding the Fourth Proportional to 259,482.40, 389,194.80 and 212,653.60

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Solution

The fourth proportional to 259,482.40, 389,194.80 and 212,653.60 is: 318,956.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,482.40 : 389,194.80 = 212,653.60 : x
  2. Step 2: Convert to fraction form
    259,482.40/389,194.80 = 212,653.60/x
  3. Step 3: Cross multiply
    259,482.40x = 389,194.80 × 212,653.60
  4. Step 4: Simplify right side
    259,482.40x = 82,763,675,321.28
  5. Step 5: Solve for x
    x = 82,763,675,321.28/259,482.40
  6. Step 6: Final answer
    x = 318,956.80

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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.