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Finding the Fourth Proportional to 3,902.87, 5,854.31 and 981.06

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Solution

The fourth proportional to 3,902.87, 5,854.31 and 981.06 is: 1,471.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902.87 : 5,854.31 = 981.06 : x
  2. Step 2: Convert to fraction form
    3,902.87/5,854.31 = 981.06/x
  3. Step 3: Cross multiply
    3,902.87x = 5,854.31 × 981.06
  4. Step 4: Simplify right side
    3,902.87x = 5,743,424.46
  5. Step 5: Solve for x
    x = 5,743,424.46/3,902.87
  6. Step 6: Final answer
    x = 1,471.59

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1.5x scale

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.