Home / 979,940.80-1,469,911.20-644,017.60

Finding the Fourth Proportional to 979,940.80, 1,469,911.20 and 644,017.60

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Solution

The fourth proportional to 979,940.80, 1,469,911.20 and 644,017.60 is: 966,026.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,940.80 : 1,469,911.20 = 644,017.60 : x
  2. Step 2: Convert to fraction form
    979,940.80/1,469,911.20 = 644,017.60/x
  3. Step 3: Cross multiply
    979,940.80x = 1,469,911.20 × 644,017.60
  4. Step 4: Simplify right side
    979,940.80x = 946,648,683,237.12
  5. Step 5: Solve for x
    x = 946,648,683,237.12/979,940.80
  6. Step 6: Final answer
    x = 966,026.40

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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.