Home / 678,852.92-936,985.38-392,331.62

Finding the Fourth Proportional to 678,852.92, 936,985.38 and 392,331.62

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Solution

The fourth proportional to 678,852.92, 936,985.38 and 392,331.62 is: 541,514.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,852.92 : 936,985.38 = 392,331.62 : x
  2. Step 2: Convert to fraction form
    678,852.92/936,985.38 = 392,331.62/x
  3. Step 3: Cross multiply
    678,852.92x = 936,985.38 × 392,331.62
  4. Step 4: Simplify right side
    678,852.92x = 367,608,992,051.72
  5. Step 5: Solve for x
    x = 367,608,992,051.72/678,852.92
  6. Step 6: Final answer
    x = 541,514.93

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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.