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Finding the Fourth Proportional to 3,903.59, 5,855.49 and 981.95

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Solution

The fourth proportional to 3,903.59, 5,855.49 and 981.95 is: 1,472.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,903.59 : 5,855.49 = 981.95 : x
  2. Step 2: Convert to fraction form
    3,903.59/5,855.49 = 981.95/x
  3. Step 3: Cross multiply
    3,903.59x = 5,855.49 × 981.95
  4. Step 4: Simplify right side
    3,903.59x = 5,749,769.13
  5. Step 5: Solve for x
    x = 5,749,769.13/3,903.59
  6. Step 6: Final answer
    x = 1,472.94

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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.