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Finding the Fourth Proportional to 381,387.81, 526,315.18 and 211,649.25

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Solution

The fourth proportional to 381,387.81, 526,315.18 and 211,649.25 is: 292,075.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,387.81 : 526,315.18 = 211,649.25 : x
  2. Step 2: Convert to fraction form
    381,387.81/526,315.18 = 211,649.25/x
  3. Step 3: Cross multiply
    381,387.81x = 526,315.18 × 211,649.25
  4. Step 4: Simplify right side
    381,387.81x = 111,394,213,110.62
  5. Step 5: Solve for x
    x = 111,394,213,110.62/381,387.81
  6. Step 6: Final answer
    x = 292,075.97

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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.