Home / 1,981.17-2,969.73-1,289.23

Finding the Fourth Proportional to 1,981.17, 2,969.73 and 1,289.23

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Solution

The fourth proportional to 1,981.17, 2,969.73 and 1,289.23 is: 1,932.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.17 : 2,969.73 = 1,289.23 : x
  2. Step 2: Convert to fraction form
    1,981.17/2,969.73 = 1,289.23/x
  3. Step 3: Cross multiply
    1,981.17x = 2,969.73 × 1,289.23
  4. Step 4: Simplify right side
    1,981.17x = 3,828,657.58
  5. Step 5: Solve for x
    x = 3,828,657.58/1,981.17
  6. Step 6: Final answer
    x = 1,932.52

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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.