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Finding the Fourth Proportional to 425,485.80, 638,520.30 and 188,998.20

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Solution

The fourth proportional to 425,485.80, 638,520.30 and 188,998.20 is: 283,626.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,485.80 : 638,520.30 = 188,998.20 : x
  2. Step 2: Convert to fraction form
    425,485.80/638,520.30 = 188,998.20/x
  3. Step 3: Cross multiply
    425,485.80x = 638,520.30 × 188,998.20
  4. Step 4: Simplify right side
    425,485.80x = 120,679,187,363.46
  5. Step 5: Solve for x
    x = 120,679,187,363.46/425,485.80
  6. Step 6: Final answer
    x = 283,626.83

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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.