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Finding the Fourth Proportional to 262,878.44, 394,280.60 and 85,387.59

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Solution

The fourth proportional to 262,878.44, 394,280.60 and 85,387.59 is: 128,069.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,878.44 : 394,280.60 = 85,387.59 : x
  2. Step 2: Convert to fraction form
    262,878.44/394,280.60 = 85,387.59/x
  3. Step 3: Cross multiply
    262,878.44x = 394,280.60 × 85,387.59
  4. Step 4: Simplify right side
    262,878.44x = 33,666,669,790.82
  5. Step 5: Solve for x
    x = 33,666,669,790.82/262,878.44
  6. Step 6: Final answer
    x = 128,069.35

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1.5x scale

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.