Home / 1,971.43-2,721.68-1,309.18

Finding the Fourth Proportional to 1,971.43, 2,721.68 and 1,309.18

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Solution

The fourth proportional to 1,971.43, 2,721.68 and 1,309.18 is: 1,807.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.43 : 2,721.68 = 1,309.18 : x
  2. Step 2: Convert to fraction form
    1,971.43/2,721.68 = 1,309.18/x
  3. Step 3: Cross multiply
    1,971.43x = 2,721.68 × 1,309.18
  4. Step 4: Simplify right side
    1,971.43x = 3,563,169.02
  5. Step 5: Solve for x
    x = 3,563,169.02/1,971.43
  6. Step 6: Final answer
    x = 1,807.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.