Home / 678,442.73-936,184.64-391,956.66

Finding the Fourth Proportional to 678,442.73, 936,184.64 and 391,956.66

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Solution

The fourth proportional to 678,442.73, 936,184.64 and 391,956.66 is: 540,861.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,442.73 : 936,184.64 = 391,956.66 : x
  2. Step 2: Convert to fraction form
    678,442.73/936,184.64 = 391,956.66/x
  3. Step 3: Cross multiply
    678,442.73x = 936,184.64 × 391,956.66
  4. Step 4: Simplify right side
    678,442.73x = 366,943,802,677.92
  5. Step 5: Solve for x
    x = 366,943,802,677.92/678,442.73
  6. Step 6: Final answer
    x = 540,861.87

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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.