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Finding the Fourth Proportional to 654,955.20, 981,856.80 and 443,908.80

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Solution

The fourth proportional to 654,955.20, 981,856.80 and 443,908.80 is: 665,472.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,955.20 : 981,856.80 = 443,908.80 : x
  2. Step 2: Convert to fraction form
    654,955.20/981,856.80 = 443,908.80/x
  3. Step 3: Cross multiply
    654,955.20x = 981,856.80 × 443,908.80
  4. Step 4: Simplify right side
    654,955.20x = 435,854,873,859.84
  5. Step 5: Solve for x
    x = 435,854,873,859.84/654,955.20
  6. Step 6: Final answer
    x = 665,472.80

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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.