Home / 987,811.20-1,481,716.80-668,946.60

Finding the Fourth Proportional to 987,811.20, 1,481,716.80 and 668,946.60

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Solution

The fourth proportional to 987,811.20, 1,481,716.80 and 668,946.60 is: 1,003,419.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,811.20 : 1,481,716.80 = 668,946.60 : x
  2. Step 2: Convert to fraction form
    987,811.20/1,481,716.80 = 668,946.60/x
  3. Step 3: Cross multiply
    987,811.20x = 1,481,716.80 × 668,946.60
  4. Step 4: Simplify right side
    987,811.20x = 991,189,415,522.88
  5. Step 5: Solve for x
    x = 991,189,415,522.88/987,811.20
  6. Step 6: Final answer
    x = 1,003,419.90

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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.