Home / 678,789.19-936,698.79-407,007.10

Finding the Fourth Proportional to 678,789.19, 936,698.79 and 407,007.10

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Solution

The fourth proportional to 678,789.19, 936,698.79 and 407,007.10 is: 561,651.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,789.19 : 936,698.79 = 407,007.10 : x
  2. Step 2: Convert to fraction form
    678,789.19/936,698.79 = 407,007.10/x
  3. Step 3: Cross multiply
    678,789.19x = 936,698.79 × 407,007.10
  4. Step 4: Simplify right side
    678,789.19x = 381,243,058,091.41
  5. Step 5: Solve for x
    x = 381,243,058,091.41/678,789.19
  6. Step 6: Final answer
    x = 561,651.63

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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.