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Finding the Fourth Proportional to 418,068.18, 629,891.40 and 378,133.25

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Solution

The fourth proportional to 418,068.18, 629,891.40 and 378,133.25 is: 569,722.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,068.18 : 629,891.40 = 378,133.25 : x
  2. Step 2: Convert to fraction form
    418,068.18/629,891.40 = 378,133.25/x
  3. Step 3: Cross multiply
    418,068.18x = 629,891.40 × 378,133.25
  4. Step 4: Simplify right side
    418,068.18x = 238,182,882,229.05
  5. Step 5: Solve for x
    x = 238,182,882,229.05/418,068.18
  6. Step 6: Final answer
    x = 569,722.59

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.