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Finding the Fourth Proportional to 1,972.82, 2,958.44 and 985.30

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Solution

The fourth proportional to 1,972.82, 2,958.44 and 985.30 is: 1,477.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.82 : 2,958.44 = 985.30 : x
  2. Step 2: Convert to fraction form
    1,972.82/2,958.44 = 985.30/x
  3. Step 3: Cross multiply
    1,972.82x = 2,958.44 × 985.30
  4. Step 4: Simplify right side
    1,972.82x = 2,914,938.61
  5. Step 5: Solve for x
    x = 2,914,938.61/1,972.82
  6. Step 6: Final answer
    x = 1,477.55

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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.