Home / 1,972.30-2,721.39-1,186.40

Finding the Fourth Proportional to 1,972.30, 2,721.39 and 1,186.40

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Solution

The fourth proportional to 1,972.30, 2,721.39 and 1,186.40 is: 1,637.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.30 : 2,721.39 = 1,186.40 : x
  2. Step 2: Convert to fraction form
    1,972.30/2,721.39 = 1,186.40/x
  3. Step 3: Cross multiply
    1,972.30x = 2,721.39 × 1,186.40
  4. Step 4: Simplify right side
    1,972.30x = 3,228,643.49
  5. Step 5: Solve for x
    x = 3,228,643.49/1,972.30
  6. Step 6: Final answer
    x = 1,637.00

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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.