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Finding the Fourth Proportional to 262,970.80, 394,456.20 and 115,514.80

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Solution

The fourth proportional to 262,970.80, 394,456.20 and 115,514.80 is: 173,272.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,970.80 : 394,456.20 = 115,514.80 : x
  2. Step 2: Convert to fraction form
    262,970.80/394,456.20 = 115,514.80/x
  3. Step 3: Cross multiply
    262,970.80x = 394,456.20 × 115,514.80
  4. Step 4: Simplify right side
    262,970.80x = 45,565,529,051.76
  5. Step 5: Solve for x
    x = 45,565,529,051.76/262,970.80
  6. Step 6: Final answer
    x = 173,272.20

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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.