Home / 987,076.80-1,478,400.86-809,929.80

Finding the Fourth Proportional to 987,076.80, 1,478,400.86 and 809,929.80

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Solution

The fourth proportional to 987,076.80, 1,478,400.86 and 809,929.80 is: 1,213,077.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,076.80 : 1,478,400.86 = 809,929.80 : x
  2. Step 2: Convert to fraction form
    987,076.80/1,478,400.86 = 809,929.80/x
  3. Step 3: Cross multiply
    987,076.80x = 1,478,400.86 × 809,929.80
  4. Step 4: Simplify right side
    987,076.80x = 1,197,400,914,884.45
  5. Step 5: Solve for x
    x = 1,197,400,914,884.45/987,076.80
  6. Step 6: Final answer
    x = 1,213,077.76

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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.