Home / 740,860.80-1,111,550.40-320,438.40

Finding the Fourth Proportional to 740,860.80, 1,111,550.40 and 320,438.40

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Solution

The fourth proportional to 740,860.80, 1,111,550.40 and 320,438.40 is: 480,769.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    740,860.80 : 1,111,550.40 = 320,438.40 : x
  2. Step 2: Convert to fraction form
    740,860.80/1,111,550.40 = 320,438.40/x
  3. Step 3: Cross multiply
    740,860.80x = 1,111,550.40 × 320,438.40
  4. Step 4: Simplify right side
    740,860.80x = 356,183,431,695.36
  5. Step 5: Solve for x
    x = 356,183,431,695.36/740,860.80
  6. Step 6: Final answer
    x = 480,769.71

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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.