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Finding the Fourth Proportional to 279,100.36, 385,155.78 and 151,777

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Solution

The fourth proportional to 279,100.36, 385,155.78 and 151,777 is: 209,450.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,100.36 : 385,155.78 = 151,777 : x
  2. Step 2: Convert to fraction form
    279,100.36/385,155.78 = 151,777/x
  3. Step 3: Cross multiply
    279,100.36x = 385,155.78 × 151,777
  4. Step 4: Simplify right side
    279,100.36x = 58,457,788,821.06
  5. Step 5: Solve for x
    x = 58,457,788,821.06/279,100.36
  6. Step 6: Final answer
    x = 209,450.78

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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.