Home / 2,971.80-4,453.65-1,981.80

Finding the Fourth Proportional to 2,971.80, 4,453.65 and 1,981.80

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Solution

The fourth proportional to 2,971.80, 4,453.65 and 1,981.80 is: 2,970.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.80 : 4,453.65 = 1,981.80 : x
  2. Step 2: Convert to fraction form
    2,971.80/4,453.65 = 1,981.80/x
  3. Step 3: Cross multiply
    2,971.80x = 4,453.65 × 1,981.80
  4. Step 4: Simplify right side
    2,971.80x = 8,826,243.57
  5. Step 5: Solve for x
    x = 8,826,243.57/2,971.80
  6. Step 6: Final answer
    x = 2,970.00

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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.