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Finding the Fourth Proportional to 764,693.60, 1,147,915.20 and 449,328.20

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Solution

The fourth proportional to 764,693.60, 1,147,915.20 and 449,328.20 is: 674,506.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,693.60 : 1,147,915.20 = 449,328.20 : x
  2. Step 2: Convert to fraction form
    764,693.60/1,147,915.20 = 449,328.20/x
  3. Step 3: Cross multiply
    764,693.60x = 1,147,915.20 × 449,328.20
  4. Step 4: Simplify right side
    764,693.60x = 515,790,670,568.64
  5. Step 5: Solve for x
    x = 515,790,670,568.64/764,693.60
  6. Step 6: Final answer
    x = 674,506.33

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1.5x scale

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.