Home / 2,101.84-2,900.40-1,217.49

Finding the Fourth Proportional to 2,101.84, 2,900.40 and 1,217.49

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Solution

The fourth proportional to 2,101.84, 2,900.40 and 1,217.49 is: 1,680.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.84 : 2,900.40 = 1,217.49 : x
  2. Step 2: Convert to fraction form
    2,101.84/2,900.40 = 1,217.49/x
  3. Step 3: Cross multiply
    2,101.84x = 2,900.40 × 1,217.49
  4. Step 4: Simplify right side
    2,101.84x = 3,531,208.00
  5. Step 5: Solve for x
    x = 3,531,208.00/2,101.84
  6. Step 6: Final answer
    x = 1,680.06

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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.