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Finding the Fourth Proportional to 425,848.80, 638,363.60 and 331,026.40

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Solution

The fourth proportional to 425,848.80, 638,363.60 and 331,026.40 is: 496,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,848.80 : 638,363.60 = 331,026.40 : x
  2. Step 2: Convert to fraction form
    425,848.80/638,363.60 = 331,026.40/x
  3. Step 3: Cross multiply
    425,848.80x = 638,363.60 × 331,026.40
  4. Step 4: Simplify right side
    425,848.80x = 211,315,204,399.04
  5. Step 5: Solve for x
    x = 211,315,204,399.04/425,848.80
  6. Step 6: Final answer
    x = 496,221.20

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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.