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Finding the Fourth Proportional to 678,851.69, 936,711.27 and 392,316.48

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Solution

The fourth proportional to 678,851.69, 936,711.27 and 392,316.48 is: 541,336.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,851.69 : 936,711.27 = 392,316.48 : x
  2. Step 2: Convert to fraction form
    678,851.69/936,711.27 = 392,316.48/x
  3. Step 3: Cross multiply
    678,851.69x = 936,711.27 × 392,316.48
  4. Step 4: Simplify right side
    678,851.69x = 367,487,268,222.73
  5. Step 5: Solve for x
    x = 367,487,268,222.73/678,851.69
  6. Step 6: Final answer
    x = 541,336.61

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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.