Home / 878,172.50-1,211,880.04-491,001.78

Finding the Fourth Proportional to 878,172.50, 1,211,880.04 and 491,001.78

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Solution

The fourth proportional to 878,172.50, 1,211,880.04 and 491,001.78 is: 677,583.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,172.50 : 1,211,880.04 = 491,001.78 : x
  2. Step 2: Convert to fraction form
    878,172.50/1,211,880.04 = 491,001.78/x
  3. Step 3: Cross multiply
    878,172.50x = 1,211,880.04 × 491,001.78
  4. Step 4: Simplify right side
    878,172.50x = 595,035,256,786.47
  5. Step 5: Solve for x
    x = 595,035,256,786.47/878,172.50
  6. Step 6: Final answer
    x = 677,583.57

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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.