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Finding the Fourth Proportional to 485,969.80, 728,950.38 and 130,954.36

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Solution

The fourth proportional to 485,969.80, 728,950.38 and 130,954.36 is: 196,430.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,969.80 : 728,950.38 = 130,954.36 : x
  2. Step 2: Convert to fraction form
    485,969.80/728,950.38 = 130,954.36/x
  3. Step 3: Cross multiply
    485,969.80x = 728,950.38 × 130,954.36
  4. Step 4: Simplify right side
    485,969.80x = 95,459,230,484.66
  5. Step 5: Solve for x
    x = 95,459,230,484.66/485,969.80
  6. Step 6: Final answer
    x = 196,430.38

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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.