Home / 1,981.32-2,972.44-1,056.39

Finding the Fourth Proportional to 1,981.32, 2,972.44 and 1,056.39

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Solution

The fourth proportional to 1,981.32, 2,972.44 and 1,056.39 is: 1,584.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.32 : 2,972.44 = 1,056.39 : x
  2. Step 2: Convert to fraction form
    1,981.32/2,972.44 = 1,056.39/x
  3. Step 3: Cross multiply
    1,981.32x = 2,972.44 × 1,056.39
  4. Step 4: Simplify right side
    1,981.32x = 3,140,064.40
  5. Step 5: Solve for x
    x = 3,140,064.40/1,981.32
  6. Step 6: Final answer
    x = 1,584.83

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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.