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Finding the Fourth Proportional to 521,718.80, 782,578.20 and 272,886.80

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Solution

The fourth proportional to 521,718.80, 782,578.20 and 272,886.80 is: 409,330.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,718.80 : 782,578.20 = 272,886.80 : x
  2. Step 2: Convert to fraction form
    521,718.80/782,578.20 = 272,886.80/x
  3. Step 3: Cross multiply
    521,718.80x = 782,578.20 × 272,886.80
  4. Step 4: Simplify right side
    521,718.80x = 213,555,260,747.76
  5. Step 5: Solve for x
    x = 213,555,260,747.76/521,718.80
  6. Step 6: Final answer
    x = 409,330.20

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Similar ratio
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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.