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Finding the Fourth Proportional to 449,516.40, 674,274.60 and 428,780.40

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Solution

The fourth proportional to 449,516.40, 674,274.60 and 428,780.40 is: 643,170.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,516.40 : 674,274.60 = 428,780.40 : x
  2. Step 2: Convert to fraction form
    449,516.40/674,274.60 = 428,780.40/x
  3. Step 3: Cross multiply
    449,516.40x = 674,274.60 × 428,780.40
  4. Step 4: Simplify right side
    449,516.40x = 289,115,732,697.84
  5. Step 5: Solve for x
    x = 289,115,732,697.84/449,516.40
  6. Step 6: Final answer
    x = 643,170.60

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Similar ratio
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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.