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Finding the Fourth Proportional to 490,915.69, 677,467.80 and 276,053.87

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Solution

The fourth proportional to 490,915.69, 677,467.80 and 276,053.87 is: 380,956.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,915.69 : 677,467.80 = 276,053.87 : x
  2. Step 2: Convert to fraction form
    490,915.69/677,467.80 = 276,053.87/x
  3. Step 3: Cross multiply
    490,915.69x = 677,467.80 × 276,053.87
  4. Step 4: Simplify right side
    490,915.69x = 187,017,609,684.06
  5. Step 5: Solve for x
    x = 187,017,609,684.06/490,915.69
  6. Step 6: Final answer
    x = 380,956.68

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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.