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Finding the Fourth Proportional to 647,493.80, 970,203.90 and 425,618.60

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Solution

The fourth proportional to 647,493.80, 970,203.90 and 425,618.60 is: 637,746.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,493.80 : 970,203.90 = 425,618.60 : x
  2. Step 2: Convert to fraction form
    647,493.80/970,203.90 = 425,618.60/x
  3. Step 3: Cross multiply
    647,493.80x = 970,203.90 × 425,618.60
  4. Step 4: Simplify right side
    647,493.80x = 412,936,825,632.54
  5. Step 5: Solve for x
    x = 412,936,825,632.54/647,493.80
  6. Step 6: Final answer
    x = 637,746.38

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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.