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Finding the Fourth Proportional to 621,384.18, 857,738.97 and 545,709.30

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Solution

The fourth proportional to 621,384.18, 857,738.97 and 545,709.30 is: 753,279.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,384.18 : 857,738.97 = 545,709.30 : x
  2. Step 2: Convert to fraction form
    621,384.18/857,738.97 = 545,709.30/x
  3. Step 3: Cross multiply
    621,384.18x = 857,738.97 × 545,709.30
  4. Step 4: Simplify right side
    621,384.18x = 468,076,132,901.42
  5. Step 5: Solve for x
    x = 468,076,132,901.42/621,384.18
  6. Step 6: Final answer
    x = 753,279.77

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