Home / 678,435.72-936,174.98-391,949.66

Finding the Fourth Proportional to 678,435.72, 936,174.98 and 391,949.66

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Solution

The fourth proportional to 678,435.72, 936,174.98 and 391,949.66 is: 540,852.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,435.72 : 936,174.98 = 391,949.66 : x
  2. Step 2: Convert to fraction form
    678,435.72/936,174.98 = 391,949.66/x
  3. Step 3: Cross multiply
    678,435.72x = 936,174.98 × 391,949.66
  4. Step 4: Simplify right side
    678,435.72x = 366,933,465,111.51
  5. Step 5: Solve for x
    x = 366,933,465,111.51/678,435.72
  6. Step 6: Final answer
    x = 540,852.22

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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.