Home / 645,028.80-967,543.20-408,638.40

Finding the Fourth Proportional to 645,028.80, 967,543.20 and 408,638.40

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Solution

The fourth proportional to 645,028.80, 967,543.20 and 408,638.40 is: 612,957.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,028.80 : 967,543.20 = 408,638.40 : x
  2. Step 2: Convert to fraction form
    645,028.80/967,543.20 = 408,638.40/x
  3. Step 3: Cross multiply
    645,028.80x = 967,543.20 × 408,638.40
  4. Step 4: Simplify right side
    645,028.80x = 395,375,305,178.88
  5. Step 5: Solve for x
    x = 395,375,305,178.88/645,028.80
  6. Step 6: Final answer
    x = 612,957.60

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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.