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Finding the Fourth Proportional to 268,947.80, 403,421.70 and 225,645.20

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Solution

The fourth proportional to 268,947.80, 403,421.70 and 225,645.20 is: 338,467.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,947.80 : 403,421.70 = 225,645.20 : x
  2. Step 2: Convert to fraction form
    268,947.80/403,421.70 = 225,645.20/x
  3. Step 3: Cross multiply
    268,947.80x = 403,421.70 × 225,645.20
  4. Step 4: Simplify right side
    268,947.80x = 91,030,170,180.84
  5. Step 5: Solve for x
    x = 91,030,170,180.84/268,947.80
  6. Step 6: Final answer
    x = 338,467.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.