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Finding the Fourth Proportional to 644,705.35, 889,657.16 and 386,453.07

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Solution

The fourth proportional to 644,705.35, 889,657.16 and 386,453.07 is: 533,283.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,705.35 : 889,657.16 = 386,453.07 : x
  2. Step 2: Convert to fraction form
    644,705.35/889,657.16 = 386,453.07/x
  3. Step 3: Cross multiply
    644,705.35x = 889,657.16 × 386,453.07
  4. Step 4: Simplify right side
    644,705.35x = 343,810,740,729.48
  5. Step 5: Solve for x
    x = 343,810,740,729.48/644,705.35
  6. Step 6: Final answer
    x = 533,283.52

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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.