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Finding the Fourth Proportional to 667,155.57, 920,605.95 and 380,620.50

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Solution

The fourth proportional to 667,155.57, 920,605.95 and 380,620.50 is: 525,217.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,155.57 : 920,605.95 = 380,620.50 : x
  2. Step 2: Convert to fraction form
    667,155.57/920,605.95 = 380,620.50/x
  3. Step 3: Cross multiply
    667,155.57x = 920,605.95 × 380,620.50
  4. Step 4: Simplify right side
    667,155.57x = 350,401,496,991.98
  5. Step 5: Solve for x
    x = 350,401,496,991.98/667,155.57
  6. Step 6: Final answer
    x = 525,217.07

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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.