Home / 678,794.19-936,705.69-407,012.10

Finding the Fourth Proportional to 678,794.19, 936,705.69 and 407,012.10

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Solution

The fourth proportional to 678,794.19, 936,705.69 and 407,012.10 is: 561,658.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,794.19 : 936,705.69 = 407,012.10 : x
  2. Step 2: Convert to fraction form
    678,794.19/936,705.69 = 407,012.10/x
  3. Step 3: Cross multiply
    678,794.19x = 936,705.69 × 407,012.10
  4. Step 4: Simplify right side
    678,794.19x = 381,250,549,968.85
  5. Step 5: Solve for x
    x = 381,250,549,968.85/678,794.19
  6. Step 6: Final answer
    x = 561,658.53

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Double scale
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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.