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Finding the Fourth Proportional to 485,719.94, 728,523.11 and 130,706.06

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Solution

The fourth proportional to 485,719.94, 728,523.11 and 130,706.06 is: 196,043.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,719.94 : 728,523.11 = 130,706.06 : x
  2. Step 2: Convert to fraction form
    485,719.94/728,523.11 = 130,706.06/x
  3. Step 3: Cross multiply
    485,719.94x = 728,523.11 × 130,706.06
  4. Step 4: Simplify right side
    485,719.94x = 95,222,382,011.20
  5. Step 5: Solve for x
    x = 95,222,382,011.20/485,719.94
  6. Step 6: Final answer
    x = 196,043.80

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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.