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Finding the Fourth Proportional to 279,288.54, 385,419.87 and 151,964.91

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Solution

The fourth proportional to 279,288.54, 385,419.87 and 151,964.91 is: 209,712.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,288.54 : 385,419.87 = 151,964.91 : x
  2. Step 2: Convert to fraction form
    279,288.54/385,419.87 = 151,964.91/x
  3. Step 3: Cross multiply
    279,288.54x = 385,419.87 × 151,964.91
  4. Step 4: Simplify right side
    279,288.54x = 58,570,295,856.76
  5. Step 5: Solve for x
    x = 58,570,295,856.76/279,288.54
  6. Step 6: Final answer
    x = 209,712.49

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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.