Home / 1,541.36-2,126.95-911.86

Finding the Fourth Proportional to 1,541.36, 2,126.95 and 911.86

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Solution

The fourth proportional to 1,541.36, 2,126.95 and 911.86 is: 1,258.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.36 : 2,126.95 = 911.86 : x
  2. Step 2: Convert to fraction form
    1,541.36/2,126.95 = 911.86/x
  3. Step 3: Cross multiply
    1,541.36x = 2,126.95 × 911.86
  4. Step 4: Simplify right side
    1,541.36x = 1,939,473.03
  5. Step 5: Solve for x
    x = 1,939,473.03/1,541.36
  6. Step 6: Final answer
    x = 1,258.28

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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.