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Finding the Fourth Proportional to 667,459.98, 920,356.83 and 425,359.26

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Solution

The fourth proportional to 667,459.98, 920,356.83 and 425,359.26 is: 586,525.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,459.98 : 920,356.83 = 425,359.26 : x
  2. Step 2: Convert to fraction form
    667,459.98/920,356.83 = 425,359.26/x
  3. Step 3: Cross multiply
    667,459.98x = 920,356.83 × 425,359.26
  4. Step 4: Simplify right side
    667,459.98x = 391,482,300,144.75
  5. Step 5: Solve for x
    x = 391,482,300,144.75/667,459.98
  6. Step 6: Final answer
    x = 586,525.50

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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.