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Finding the Fourth Proportional to 667,374.21, 920,238.44 and 425,273.31

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Solution

The fourth proportional to 667,374.21, 920,238.44 and 425,273.31 is: 586,406.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,374.21 : 920,238.44 = 425,273.31 : x
  2. Step 2: Convert to fraction form
    667,374.21/920,238.44 = 425,273.31/x
  3. Step 3: Cross multiply
    667,374.21x = 920,238.44 × 425,273.31
  4. Step 4: Simplify right side
    667,374.21x = 391,352,845,241.67
  5. Step 5: Solve for x
    x = 391,352,845,241.67/667,374.21
  6. Step 6: Final answer
    x = 586,406.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.