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Finding the Fourth Proportional to 644,469.30, 889,363.26 and 357,996.60

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Solution

The fourth proportional to 644,469.30, 889,363.26 and 357,996.60 is: 494,032.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,469.30 : 889,363.26 = 357,996.60 : x
  2. Step 2: Convert to fraction form
    644,469.30/889,363.26 = 357,996.60/x
  3. Step 3: Cross multiply
    644,469.30x = 889,363.26 × 357,996.60
  4. Step 4: Simplify right side
    644,469.30x = 318,389,023,244.92
  5. Step 5: Solve for x
    x = 318,389,023,244.92/644,469.30
  6. Step 6: Final answer
    x = 494,032.88

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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.