Home / 645,900.20-968,735.10-408,818.60

Finding the Fourth Proportional to 645,900.20, 968,735.10 and 408,818.60

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Solution

The fourth proportional to 645,900.20, 968,735.10 and 408,818.60 is: 613,154.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,900.20 : 968,735.10 = 408,818.60 : x
  2. Step 2: Convert to fraction form
    645,900.20/968,735.10 = 408,818.60/x
  3. Step 3: Cross multiply
    645,900.20x = 968,735.10 × 408,818.60
  4. Step 4: Simplify right side
    645,900.20x = 396,036,927,352.86
  5. Step 5: Solve for x
    x = 396,036,927,352.86/645,900.20
  6. Step 6: Final answer
    x = 613,154.98

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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.