Home / 1,541.21-2,126.71-911.76

Finding the Fourth Proportional to 1,541.21, 2,126.71 and 911.76

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Solution

The fourth proportional to 1,541.21, 2,126.71 and 911.76 is: 1,258.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.21 : 2,126.71 = 911.76 : x
  2. Step 2: Convert to fraction form
    1,541.21/2,126.71 = 911.76/x
  3. Step 3: Cross multiply
    1,541.21x = 2,126.71 × 911.76
  4. Step 4: Simplify right side
    1,541.21x = 1,939,052.15
  5. Step 5: Solve for x
    x = 1,939,052.15/1,541.21
  6. Step 6: Final answer
    x = 1,258.13

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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.