Home / 1,721.84-2,376.96-1,320.20

Finding the Fourth Proportional to 1,721.84, 2,376.96 and 1,320.20

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Solution

The fourth proportional to 1,721.84, 2,376.96 and 1,320.20 is: 1,822.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.84 : 2,376.96 = 1,320.20 : x
  2. Step 2: Convert to fraction form
    1,721.84/2,376.96 = 1,320.20/x
  3. Step 3: Cross multiply
    1,721.84x = 2,376.96 × 1,320.20
  4. Step 4: Simplify right side
    1,721.84x = 3,138,062.59
  5. Step 5: Solve for x
    x = 3,138,062.59/1,721.84
  6. Step 6: Final answer
    x = 1,822.51

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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.