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Finding the Fourth Proportional to 485,755.36, 728,567.22 and 130,790.68

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Solution

The fourth proportional to 485,755.36, 728,567.22 and 130,790.68 is: 196,168.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,755.36 : 728,567.22 = 130,790.68 : x
  2. Step 2: Convert to fraction form
    485,755.36/728,567.22 = 130,790.68/x
  3. Step 3: Cross multiply
    485,755.36x = 728,567.22 × 130,790.68
  4. Step 4: Simplify right side
    485,755.36x = 95,289,802,129.51
  5. Step 5: Solve for x
    x = 95,289,802,129.51/485,755.36
  6. Step 6: Final answer
    x = 196,168.30

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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.