Home / 1,981.44-2,972.16-1,330.20

Finding the Fourth Proportional to 1,981.44, 2,972.16 and 1,330.20

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Solution

The fourth proportional to 1,981.44, 2,972.16 and 1,330.20 is: 1,995.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.44 : 2,972.16 = 1,330.20 : x
  2. Step 2: Convert to fraction form
    1,981.44/2,972.16 = 1,330.20/x
  3. Step 3: Cross multiply
    1,981.44x = 2,972.16 × 1,330.20
  4. Step 4: Simplify right side
    1,981.44x = 3,953,567.23
  5. Step 5: Solve for x
    x = 3,953,567.23/1,981.44
  6. Step 6: Final answer
    x = 1,995.30

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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.