Home / 1,981.70-2,972.55-1,636.10

Finding the Fourth Proportional to 1,981.70, 2,972.55 and 1,636.10

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Solution

The fourth proportional to 1,981.70, 2,972.55 and 1,636.10 is: 2,454.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.70 : 2,972.55 = 1,636.10 : x
  2. Step 2: Convert to fraction form
    1,981.70/2,972.55 = 1,636.10/x
  3. Step 3: Cross multiply
    1,981.70x = 2,972.55 × 1,636.10
  4. Step 4: Simplify right side
    1,981.70x = 4,863,389.06
  5. Step 5: Solve for x
    x = 4,863,389.06/1,981.70
  6. Step 6: Final answer
    x = 2,454.15

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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.