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Finding the Fourth Proportional to 629,961.54, 869,309.28 and 357,991.80

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Solution

The fourth proportional to 629,961.54, 869,309.28 and 357,991.80 is: 494,007.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,961.54 : 869,309.28 = 357,991.80 : x
  2. Step 2: Convert to fraction form
    629,961.54/869,309.28 = 357,991.80/x
  3. Step 3: Cross multiply
    629,961.54x = 869,309.28 × 357,991.80
  4. Step 4: Simplify right side
    629,961.54x = 311,205,593,903.90
  5. Step 5: Solve for x
    x = 311,205,593,903.90/629,961.54
  6. Step 6: Final answer
    x = 494,007.29

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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.