Home / 1,971.84-2,721.14-1,551.40

Finding the Fourth Proportional to 1,971.84, 2,721.14 and 1,551.40

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Solution

The fourth proportional to 1,971.84, 2,721.14 and 1,551.40 is: 2,140.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.84 : 2,721.14 = 1,551.40 : x
  2. Step 2: Convert to fraction form
    1,971.84/2,721.14 = 1,551.40/x
  3. Step 3: Cross multiply
    1,971.84x = 2,721.14 × 1,551.40
  4. Step 4: Simplify right side
    1,971.84x = 4,221,591.89
  5. Step 5: Solve for x
    x = 4,221,591.89/1,971.84
  6. Step 6: Final answer
    x = 2,140.94

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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.