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Finding the Fourth Proportional to 667,915.80, 999,905.40 and 443,529.60

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Solution

The fourth proportional to 667,915.80, 999,905.40 and 443,529.60 is: 663,987.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,915.80 : 999,905.40 = 443,529.60 : x
  2. Step 2: Convert to fraction form
    667,915.80/999,905.40 = 443,529.60/x
  3. Step 3: Cross multiply
    667,915.80x = 999,905.40 × 443,529.60
  4. Step 4: Simplify right side
    667,915.80x = 443,487,642,099.84
  5. Step 5: Solve for x
    x = 443,487,642,099.84/667,915.80
  6. Step 6: Final answer
    x = 663,987.35

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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.