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Finding the Fourth Proportional to 493,856.64, 681,633.96 and 279,121.24

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Solution

The fourth proportional to 493,856.64, 681,633.96 and 279,121.24 is: 385,250.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,856.64 : 681,633.96 = 279,121.24 : x
  2. Step 2: Convert to fraction form
    493,856.64/681,633.96 = 279,121.24/x
  3. Step 3: Cross multiply
    493,856.64x = 681,633.96 × 279,121.24
  4. Step 4: Simplify right side
    493,856.64x = 190,258,516,141.31
  5. Step 5: Solve for x
    x = 190,258,516,141.31/493,856.64
  6. Step 6: Final answer
    x = 385,250.50

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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.