Home / 919,040.80-1,378,604.40-287,975.20

Finding the Fourth Proportional to 919,040.80, 1,378,604.40 and 287,975.20

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Solution

The fourth proportional to 919,040.80, 1,378,604.40 and 287,975.20 is: 431,976.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,040.80 : 1,378,604.40 = 287,975.20 : x
  2. Step 2: Convert to fraction form
    919,040.80/1,378,604.40 = 287,975.20/x
  3. Step 3: Cross multiply
    919,040.80x = 1,378,604.40 × 287,975.20
  4. Step 4: Simplify right side
    919,040.80x = 397,003,877,810.88
  5. Step 5: Solve for x
    x = 397,003,877,810.88/919,040.80
  6. Step 6: Final answer
    x = 431,976.34

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1.5x scale

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.