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Finding the Fourth Proportional to 615,074.40, 922,611.60 and 447,112.80

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Solution

The fourth proportional to 615,074.40, 922,611.60 and 447,112.80 is: 670,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,074.40 : 922,611.60 = 447,112.80 : x
  2. Step 2: Convert to fraction form
    615,074.40/922,611.60 = 447,112.80/x
  3. Step 3: Cross multiply
    615,074.40x = 922,611.60 × 447,112.80
  4. Step 4: Simplify right side
    615,074.40x = 412,511,455,788.48
  5. Step 5: Solve for x
    x = 412,511,455,788.48/615,074.40
  6. Step 6: Final answer
    x = 670,669.20

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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.