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Finding the Fourth Proportional to 262,426.60, 393,371.10 and 129,101.80

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Solution

The fourth proportional to 262,426.60, 393,371.10 and 129,101.80 is: 193,520.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,426.60 : 393,371.10 = 129,101.80 : x
  2. Step 2: Convert to fraction form
    262,426.60/393,371.10 = 129,101.80/x
  3. Step 3: Cross multiply
    262,426.60x = 393,371.10 × 129,101.80
  4. Step 4: Simplify right side
    262,426.60x = 50,784,917,077.98
  5. Step 5: Solve for x
    x = 50,784,917,077.98/262,426.60
  6. Step 6: Final answer
    x = 193,520.46

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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.