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Finding the Fourth Proportional to 447,915.89, 670,295.15 and 279,515.48

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Solution

The fourth proportional to 447,915.89, 670,295.15 and 279,515.48 is: 418,288.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,915.89 : 670,295.15 = 279,515.48 : x
  2. Step 2: Convert to fraction form
    447,915.89/670,295.15 = 279,515.48/x
  3. Step 3: Cross multiply
    447,915.89x = 670,295.15 × 279,515.48
  4. Step 4: Simplify right side
    447,915.89x = 187,357,866,893.05
  5. Step 5: Solve for x
    x = 187,357,866,893.05/447,915.89
  6. Step 6: Final answer
    x = 418,288.05

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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.