Home / 919,270.80-1,378,949.40-288,205.20

Finding the Fourth Proportional to 919,270.80, 1,378,949.40 and 288,205.20

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Solution

The fourth proportional to 919,270.80, 1,378,949.40 and 288,205.20 is: 432,321.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,270.80 : 1,378,949.40 = 288,205.20 : x
  2. Step 2: Convert to fraction form
    919,270.80/1,378,949.40 = 288,205.20/x
  3. Step 3: Cross multiply
    919,270.80x = 1,378,949.40 × 288,205.20
  4. Step 4: Simplify right side
    919,270.80x = 397,420,387,616.88
  5. Step 5: Solve for x
    x = 397,420,387,616.88/919,270.80
  6. Step 6: Final answer
    x = 432,321.34

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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.