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Finding the Fourth Proportional to 448,019.20, 671,251.20 and 420,025.60

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Solution

The fourth proportional to 448,019.20, 671,251.20 and 420,025.60 is: 629,309.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,019.20 : 671,251.20 = 420,025.60 : x
  2. Step 2: Convert to fraction form
    448,019.20/671,251.20 = 420,025.60/x
  3. Step 3: Cross multiply
    448,019.20x = 671,251.20 × 420,025.60
  4. Step 4: Simplify right side
    448,019.20x = 281,942,688,030.72
  5. Step 5: Solve for x
    x = 281,942,688,030.72/448,019.20
  6. Step 6: Final answer
    x = 629,309.39

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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.