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Finding the Fourth Proportional to 620,390.11, 930,649.87 and 171,111.06

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Solution

The fourth proportional to 620,390.11, 930,649.87 and 171,111.06 is: 256,684.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,390.11 : 930,649.87 = 171,111.06 : x
  2. Step 2: Convert to fraction form
    620,390.11/930,649.87 = 171,111.06/x
  3. Step 3: Cross multiply
    620,390.11x = 930,649.87 × 171,111.06
  4. Step 4: Simplify right side
    620,390.11x = 159,244,485,744.56
  5. Step 5: Solve for x
    x = 159,244,485,744.56/620,390.11
  6. Step 6: Final answer
    x = 256,684.44

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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.