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Finding the Fourth Proportional to 1,572,188, 2,169,621.60 and 856,796

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Solution

The fourth proportional to 1,572,188, 2,169,621.60 and 856,796 is: 1,182,379.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572,188 : 2,169,621.60 = 856,796 : x
  2. Step 2: Convert to fraction form
    1,572,188/2,169,621.60 = 856,796/x
  3. Step 3: Cross multiply
    1,572,188x = 2,169,621.60 × 856,796
  4. Step 4: Simplify right side
    1,572,188x = 1,858,923,108,393.60
  5. Step 5: Solve for x
    x = 1,858,923,108,393.60/1,572,188
  6. Step 6: Final answer
    x = 1,182,379.66

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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.