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Finding the Fourth Proportional to 678,964.98, 936,956.60 and 368,859.54

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Solution

The fourth proportional to 678,964.98, 936,956.60 and 368,859.54 is: 509,017.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,964.98 : 936,956.60 = 368,859.54 : x
  2. Step 2: Convert to fraction form
    678,964.98/936,956.60 = 368,859.54/x
  3. Step 3: Cross multiply
    678,964.98x = 936,956.60 × 368,859.54
  4. Step 4: Simplify right side
    678,964.98x = 345,605,373,946.88
  5. Step 5: Solve for x
    x = 345,605,373,946.88/678,964.98
  6. Step 6: Final answer
    x = 509,017.97

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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.