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Finding the Fourth Proportional to 719,861, 993,408.26 and 418,074.44

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Solution

The fourth proportional to 719,861, 993,408.26 and 418,074.44 is: 576,942.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,861 : 993,408.26 = 418,074.44 : x
  2. Step 2: Convert to fraction form
    719,861/993,408.26 = 418,074.44/x
  3. Step 3: Cross multiply
    719,861x = 993,408.26 × 418,074.44
  4. Step 4: Simplify right side
    719,861x = 415,318,601,990.87
  5. Step 5: Solve for x
    x = 415,318,601,990.87/719,861
  6. Step 6: Final answer
    x = 576,942.77

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1.5x scale

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.