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Finding the Fourth Proportional to 678,498.19, 936,343.77 and 368,413.84

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Solution

The fourth proportional to 678,498.19, 936,343.77 and 368,413.84 is: 508,419.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,498.19 : 936,343.77 = 368,413.84 : x
  2. Step 2: Convert to fraction form
    678,498.19/936,343.77 = 368,413.84/x
  3. Step 3: Cross multiply
    678,498.19x = 936,343.77 × 368,413.84
  4. Step 4: Simplify right side
    678,498.19x = 344,962,003,865.78
  5. Step 5: Solve for x
    x = 344,962,003,865.78/678,498.19
  6. Step 6: Final answer
    x = 508,419.93

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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.