Home / 678,795.19-936,707.07-407,013.10

Finding the Fourth Proportional to 678,795.19, 936,707.07 and 407,013.10

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Solution

The fourth proportional to 678,795.19, 936,707.07 and 407,013.10 is: 561,659.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,795.19 : 936,707.07 = 407,013.10 : x
  2. Step 2: Convert to fraction form
    678,795.19/936,707.07 = 407,013.10/x
  3. Step 3: Cross multiply
    678,795.19x = 936,707.07 × 407,013.10
  4. Step 4: Simplify right side
    678,795.19x = 381,252,048,352.62
  5. Step 5: Solve for x
    x = 381,252,048,352.62/678,795.19
  6. Step 6: Final answer
    x = 561,659.91

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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.