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Finding the Fourth Proportional to 678,897.84, 936,879.38 and 372,993.94

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Solution

The fourth proportional to 678,897.84, 936,879.38 and 372,993.94 is: 514,731.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,897.84 : 936,879.38 = 372,993.94 : x
  2. Step 2: Convert to fraction form
    678,897.84/936,879.38 = 372,993.94/x
  3. Step 3: Cross multiply
    678,897.84x = 936,879.38 × 372,993.94
  4. Step 4: Simplify right side
    678,897.84x = 349,450,331,250.96
  5. Step 5: Solve for x
    x = 349,450,331,250.96/678,897.84
  6. Step 6: Final answer
    x = 514,731.84

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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.