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Finding the Fourth Proportional to 425,216.20, 639,206.70 and 301,414.60

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Solution

The fourth proportional to 425,216.20, 639,206.70 and 301,414.60 is: 453,101.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,216.20 : 639,206.70 = 301,414.60 : x
  2. Step 2: Convert to fraction form
    425,216.20/639,206.70 = 301,414.60/x
  3. Step 3: Cross multiply
    425,216.20x = 639,206.70 × 301,414.60
  4. Step 4: Simplify right side
    425,216.20x = 192,666,231,797.82
  5. Step 5: Solve for x
    x = 192,666,231,797.82/425,216.20
  6. Step 6: Final answer
    x = 453,101.81

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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.