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Finding the Fourth Proportional to 485,696.66, 728,479.37 and 130,731.98

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Solution

The fourth proportional to 485,696.66, 728,479.37 and 130,731.98 is: 196,080.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,696.66 : 728,479.37 = 130,731.98 : x
  2. Step 2: Convert to fraction form
    485,696.66/728,479.37 = 130,731.98/x
  3. Step 3: Cross multiply
    485,696.66x = 728,479.37 × 130,731.98
  4. Step 4: Simplify right side
    485,696.66x = 95,235,550,429.25
  5. Step 5: Solve for x
    x = 95,235,550,429.25/485,696.66
  6. Step 6: Final answer
    x = 196,080.31

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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.