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Finding the Fourth Proportional to 445,647.72, 668,692.08 and 209,008.56

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Solution

The fourth proportional to 445,647.72, 668,692.08 and 209,008.56 is: 313,616.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,647.72 : 668,692.08 = 209,008.56 : x
  2. Step 2: Convert to fraction form
    445,647.72/668,692.08 = 209,008.56/x
  3. Step 3: Cross multiply
    445,647.72x = 668,692.08 × 209,008.56
  4. Step 4: Simplify right side
    445,647.72x = 139,762,368,724.21
  5. Step 5: Solve for x
    x = 139,762,368,724.21/445,647.72
  6. Step 6: Final answer
    x = 313,616.25

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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.