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Finding the Fourth Proportional to 644,912.40, 966,907.80 and 289,635.60

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Solution

The fourth proportional to 644,912.40, 966,907.80 and 289,635.60 is: 434,246.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,912.40 : 966,907.80 = 289,635.60 : x
  2. Step 2: Convert to fraction form
    644,912.40/966,907.80 = 289,635.60/x
  3. Step 3: Cross multiply
    644,912.40x = 966,907.80 × 289,635.60
  4. Step 4: Simplify right side
    644,912.40x = 280,050,920,797.68
  5. Step 5: Solve for x
    x = 280,050,920,797.68/644,912.40
  6. Step 6: Final answer
    x = 434,246.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.