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Finding the Fourth Proportional to 678,532.73, 936,308.89 and 392,046.67

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Solution

The fourth proportional to 678,532.73, 936,308.89 and 392,046.67 is: 540,986.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,532.73 : 936,308.89 = 392,046.67 : x
  2. Step 2: Convert to fraction form
    678,532.73/936,308.89 = 392,046.67/x
  3. Step 3: Cross multiply
    678,532.73x = 936,308.89 × 392,046.67
  4. Step 4: Simplify right side
    678,532.73x = 367,076,782,415.90
  5. Step 5: Solve for x
    x = 367,076,782,415.90/678,532.73
  6. Step 6: Final answer
    x = 540,986.11

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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.