Home / 2,101.80-2,901.18-1,217.88

Finding the Fourth Proportional to 2,101.80, 2,901.18 and 1,217.88

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Solution

The fourth proportional to 2,101.80, 2,901.18 and 1,217.88 is: 1,681.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.80 : 2,901.18 = 1,217.88 : x
  2. Step 2: Convert to fraction form
    2,101.80/2,901.18 = 1,217.88/x
  3. Step 3: Cross multiply
    2,101.80x = 2,901.18 × 1,217.88
  4. Step 4: Simplify right side
    2,101.80x = 3,533,289.10
  5. Step 5: Solve for x
    x = 3,533,289.10/2,101.80
  6. Step 6: Final answer
    x = 1,681.08

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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.