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Finding the Fourth Proportional to 629,717.20, 869,009.97 and 357,785.45

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Solution

The fourth proportional to 629,717.20, 869,009.97 and 357,785.45 is: 493,744.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,717.20 : 869,009.97 = 357,785.45 : x
  2. Step 2: Convert to fraction form
    629,717.20/869,009.97 = 357,785.45/x
  3. Step 3: Cross multiply
    629,717.20x = 869,009.97 × 357,785.45
  4. Step 4: Simplify right side
    629,717.20x = 310,919,123,426.37
  5. Step 5: Solve for x
    x = 310,919,123,426.37/629,717.20
  6. Step 6: Final answer
    x = 493,744.06

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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.