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Finding the Fourth Proportional to 505,671.32, 697,790.94 and 279,299

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Solution

The fourth proportional to 505,671.32, 697,790.94 and 279,299 is: 385,413.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,671.32 : 697,790.94 = 279,299 : x
  2. Step 2: Convert to fraction form
    505,671.32/697,790.94 = 279,299/x
  3. Step 3: Cross multiply
    505,671.32x = 697,790.94 × 279,299
  4. Step 4: Simplify right side
    505,671.32x = 194,892,311,751.06
  5. Step 5: Solve for x
    x = 194,892,311,751.06/505,671.32
  6. Step 6: Final answer
    x = 385,413.02

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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.