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Finding the Fourth Proportional to 485,697.66, 728,480.87 and 130,732.98

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Solution

The fourth proportional to 485,697.66, 728,480.87 and 130,732.98 is: 196,081.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,697.66 : 728,480.87 = 130,732.98 : x
  2. Step 2: Convert to fraction form
    485,697.66/728,480.87 = 130,732.98/x
  3. Step 3: Cross multiply
    485,697.66x = 728,480.87 × 130,732.98
  4. Step 4: Simplify right side
    485,697.66x = 95,236,475,008.09
  5. Step 5: Solve for x
    x = 95,236,475,008.09/485,697.66
  6. Step 6: Final answer
    x = 196,081.81

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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.