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Finding the Fourth Proportional to 445,888.86, 669,051.99 and 209,250.78

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Solution

The fourth proportional to 445,888.86, 669,051.99 and 209,250.78 is: 313,978.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,888.86 : 669,051.99 = 209,250.78 : x
  2. Step 2: Convert to fraction form
    445,888.86/669,051.99 = 209,250.78/x
  3. Step 3: Cross multiply
    445,888.86x = 669,051.99 × 209,250.78
  4. Step 4: Simplify right side
    445,888.86x = 139,999,650,768.05
  5. Step 5: Solve for x
    x = 139,999,650,768.05/445,888.86
  6. Step 6: Final answer
    x = 313,978.80

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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.