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Finding the Fourth Proportional to 878,611.59, 1,212,469.56 and 491,436.05

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Solution

The fourth proportional to 878,611.59, 1,212,469.56 and 491,436.05 is: 678,173.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,611.59 : 1,212,469.56 = 491,436.05 : x
  2. Step 2: Convert to fraction form
    878,611.59/1,212,469.56 = 491,436.05/x
  3. Step 3: Cross multiply
    878,611.59x = 1,212,469.56 × 491,436.05
  4. Step 4: Simplify right side
    878,611.59x = 595,851,245,249.29
  5. Step 5: Solve for x
    x = 595,851,245,249.29/878,611.59
  6. Step 6: Final answer
    x = 678,173.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.