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Finding the Fourth Proportional to 720,550.50, 1,080,786.78 and 365,555.31

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Solution

The fourth proportional to 720,550.50, 1,080,786.78 and 365,555.31 is: 548,313.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,550.50 : 1,080,786.78 = 365,555.31 : x
  2. Step 2: Convert to fraction form
    720,550.50/1,080,786.78 = 365,555.31/x
  3. Step 3: Cross multiply
    720,550.50x = 1,080,786.78 × 365,555.31
  4. Step 4: Simplify right side
    720,550.50x = 395,087,346,406.80
  5. Step 5: Solve for x
    x = 395,087,346,406.80/720,550.50
  6. Step 6: Final answer
    x = 548,313.19

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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.