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Finding the Fourth Proportional to 312,699.28, 431,533.20 and 191,907.52

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Solution

The fourth proportional to 312,699.28, 431,533.20 and 191,907.52 is: 264,837.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,699.28 : 431,533.20 = 191,907.52 : x
  2. Step 2: Convert to fraction form
    312,699.28/431,533.20 = 191,907.52/x
  3. Step 3: Cross multiply
    312,699.28x = 431,533.20 × 191,907.52
  4. Step 4: Simplify right side
    312,699.28x = 82,814,466,209.66
  5. Step 5: Solve for x
    x = 82,814,466,209.66/312,699.28
  6. Step 6: Final answer
    x = 264,837.41

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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.