Home / 312,643.09-431,455.50-191,851.12

Finding the Fourth Proportional to 312,643.09, 431,455.50 and 191,851.12

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Solution

The fourth proportional to 312,643.09, 431,455.50 and 191,851.12 is: 264,759.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,643.09 : 431,455.50 = 191,851.12 : x
  2. Step 2: Convert to fraction form
    312,643.09/431,455.50 = 191,851.12/x
  3. Step 3: Cross multiply
    312,643.09x = 431,455.50 × 191,851.12
  4. Step 4: Simplify right side
    312,643.09x = 82,775,220,905.16
  5. Step 5: Solve for x
    x = 82,775,220,905.16/312,643.09
  6. Step 6: Final answer
    x = 264,759.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.