Home / 921,399.12-1,382,168.64-313,998.66

Finding the Fourth Proportional to 921,399.12, 1,382,168.64 and 313,998.66

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Solution

The fourth proportional to 921,399.12, 1,382,168.64 and 313,998.66 is: 471,021.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,399.12 : 1,382,168.64 = 313,998.66 : x
  2. Step 2: Convert to fraction form
    921,399.12/1,382,168.64 = 313,998.66/x
  3. Step 3: Cross multiply
    921,399.12x = 1,382,168.64 × 313,998.66
  4. Step 4: Simplify right side
    921,399.12x = 433,999,100,854.02
  5. Step 5: Solve for x
    x = 433,999,100,854.02/921,399.12
  6. Step 6: Final answer
    x = 471,021.83

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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.