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Finding the Fourth Proportional to 644,961.60, 889,798.86 and 415,501.56

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Solution

The fourth proportional to 644,961.60, 889,798.86 and 415,501.56 is: 573,232.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,961.60 : 889,798.86 = 415,501.56 : x
  2. Step 2: Convert to fraction form
    644,961.60/889,798.86 = 415,501.56/x
  3. Step 3: Cross multiply
    644,961.60x = 889,798.86 × 415,501.56
  4. Step 4: Simplify right side
    644,961.60x = 369,712,814,416.22
  5. Step 5: Solve for x
    x = 369,712,814,416.22/644,961.60
  6. Step 6: Final answer
    x = 573,232.29

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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.