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Finding the Fourth Proportional to 493,900.65, 681,581.43 and 279,040.64

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Solution

The fourth proportional to 493,900.65, 681,581.43 and 279,040.64 is: 385,075.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,900.65 : 681,581.43 = 279,040.64 : x
  2. Step 2: Convert to fraction form
    493,900.65/681,581.43 = 279,040.64/x
  3. Step 3: Cross multiply
    493,900.65x = 681,581.43 × 279,040.64
  4. Step 4: Simplify right side
    493,900.65x = 190,188,915,031.41
  5. Step 5: Solve for x
    x = 190,188,915,031.41/493,900.65
  6. Step 6: Final answer
    x = 385,075.25

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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.