Home / 1,972.39-2,721.78-1,088.20

Finding the Fourth Proportional to 1,972.39, 2,721.78 and 1,088.20

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Solution

The fourth proportional to 1,972.39, 2,721.78 and 1,088.20 is: 1,501.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.39 : 2,721.78 = 1,088.20 : x
  2. Step 2: Convert to fraction form
    1,972.39/2,721.78 = 1,088.20/x
  3. Step 3: Cross multiply
    1,972.39x = 2,721.78 × 1,088.20
  4. Step 4: Simplify right side
    1,972.39x = 2,961,844.74
  5. Step 5: Solve for x
    x = 2,961,844.74/1,972.39
  6. Step 6: Final answer
    x = 1,501.65

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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.