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Finding the Fourth Proportional to 1,954.20, 2,931.30 and 799.68

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Solution

The fourth proportional to 1,954.20, 2,931.30 and 799.68 is: 1,199.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,954.20 : 2,931.30 = 799.68 : x
  2. Step 2: Convert to fraction form
    1,954.20/2,931.30 = 799.68/x
  3. Step 3: Cross multiply
    1,954.20x = 2,931.30 × 799.68
  4. Step 4: Simplify right side
    1,954.20x = 2,344,101.98
  5. Step 5: Solve for x
    x = 2,344,101.98/1,954.20
  6. Step 6: Final answer
    x = 1,199.52

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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.