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Finding the Fourth Proportional to 485,336.24, 728,005.44 and 218,786.88

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Solution

The fourth proportional to 485,336.24, 728,005.44 and 218,786.88 is: 328,180.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,336.24 : 728,005.44 = 218,786.88 : x
  2. Step 2: Convert to fraction form
    485,336.24/728,005.44 = 218,786.88/x
  3. Step 3: Cross multiply
    485,336.24x = 728,005.44 × 218,786.88
  4. Step 4: Simplify right side
    485,336.24x = 159,278,038,840.63
  5. Step 5: Solve for x
    x = 159,278,038,840.63/485,336.24
  6. Step 6: Final answer
    x = 328,180.81

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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.