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Finding the Fourth Proportional to 505,366.72, 697,467.23 and 287,628.33

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Solution

The fourth proportional to 505,366.72, 697,467.23 and 287,628.33 is: 396,961.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,366.72 : 697,467.23 = 287,628.33 : x
  2. Step 2: Convert to fraction form
    505,366.72/697,467.23 = 287,628.33/x
  3. Step 3: Cross multiply
    505,366.72x = 697,467.23 × 287,628.33
  4. Step 4: Simplify right side
    505,366.72x = 200,611,334,900.15
  5. Step 5: Solve for x
    x = 200,611,334,900.15/505,366.72
  6. Step 6: Final answer
    x = 396,961.90

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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.