Home / 921,399.09-1,382,168.61-313,998.63

Finding the Fourth Proportional to 921,399.09, 1,382,168.61 and 313,998.63

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Solution

The fourth proportional to 921,399.09, 1,382,168.61 and 313,998.63 is: 471,021.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,399.09 : 1,382,168.61 = 313,998.63 : x
  2. Step 2: Convert to fraction form
    921,399.09/1,382,168.61 = 313,998.63/x
  3. Step 3: Cross multiply
    921,399.09x = 1,382,168.61 × 313,998.63
  4. Step 4: Simplify right side
    921,399.09x = 433,999,049,969.00
  5. Step 5: Solve for x
    x = 433,999,049,969.00/921,399.09
  6. Step 6: Final answer
    x = 471,021.79

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Double scale
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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.