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Finding the Fourth Proportional to 448,015.20, 671,245.20 and 420,021.60

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Solution

The fourth proportional to 448,015.20, 671,245.20 and 420,021.60 is: 629,303.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,015.20 : 671,245.20 = 420,021.60 : x
  2. Step 2: Convert to fraction form
    448,015.20/671,245.20 = 420,021.60/x
  3. Step 3: Cross multiply
    448,015.20x = 671,245.20 × 420,021.60
  4. Step 4: Simplify right side
    448,015.20x = 281,937,482,896.32
  5. Step 5: Solve for x
    x = 281,937,482,896.32/448,015.20
  6. Step 6: Final answer
    x = 629,303.39

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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.