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Finding the Fourth Proportional to 493,907.81, 681,591.26 and 279,047.82

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Solution

The fourth proportional to 493,907.81, 681,591.26 and 279,047.82 is: 385,085.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,907.81 : 681,591.26 = 279,047.82 : x
  2. Step 2: Convert to fraction form
    493,907.81/681,591.26 = 279,047.82/x
  3. Step 3: Cross multiply
    493,907.81x = 681,591.26 × 279,047.82
  4. Step 4: Simplify right side
    493,907.81x = 190,196,553,084.05
  5. Step 5: Solve for x
    x = 190,196,553,084.05/493,907.81
  6. Step 6: Final answer
    x = 385,085.13

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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.