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Finding the Fourth Proportional to 519,856.80, 780,130.80 and 295,216.80

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Solution

The fourth proportional to 519,856.80, 780,130.80 and 295,216.80 is: 443,021.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,856.80 : 780,130.80 = 295,216.80 : x
  2. Step 2: Convert to fraction form
    519,856.80/780,130.80 = 295,216.80/x
  3. Step 3: Cross multiply
    519,856.80x = 780,130.80 × 295,216.80
  4. Step 4: Simplify right side
    519,856.80x = 230,307,718,357.44
  5. Step 5: Solve for x
    x = 230,307,718,357.44/519,856.80
  6. Step 6: Final answer
    x = 443,021.46

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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.