Home / 1,971.78-2,721.06-1,225.74

Finding the Fourth Proportional to 1,971.78, 2,721.06 and 1,225.74

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Solution

The fourth proportional to 1,971.78, 2,721.06 and 1,225.74 is: 1,691.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.78 : 2,721.06 = 1,225.74 : x
  2. Step 2: Convert to fraction form
    1,971.78/2,721.06 = 1,225.74/x
  3. Step 3: Cross multiply
    1,971.78x = 2,721.06 × 1,225.74
  4. Step 4: Simplify right side
    1,971.78x = 3,335,312.08
  5. Step 5: Solve for x
    x = 3,335,312.08/1,971.78
  6. Step 6: Final answer
    x = 1,691.52

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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.