Home / 2,126.28-3,189.66-971.88

Finding the Fourth Proportional to 2,126.28, 3,189.66 and 971.88

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Solution

The fourth proportional to 2,126.28, 3,189.66 and 971.88 is: 1,457.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.28 : 3,189.66 = 971.88 : x
  2. Step 2: Convert to fraction form
    2,126.28/3,189.66 = 971.88/x
  3. Step 3: Cross multiply
    2,126.28x = 3,189.66 × 971.88
  4. Step 4: Simplify right side
    2,126.28x = 3,099,966.76
  5. Step 5: Solve for x
    x = 3,099,966.76/2,126.28
  6. Step 6: Final answer
    x = 1,457.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.