Home / 1,541.03-2,126.78-911.76

Finding the Fourth Proportional to 1,541.03, 2,126.78 and 911.76

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Solution

The fourth proportional to 1,541.03, 2,126.78 and 911.76 is: 1,258.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.03 : 2,126.78 = 911.76 : x
  2. Step 2: Convert to fraction form
    1,541.03/2,126.78 = 911.76/x
  3. Step 3: Cross multiply
    1,541.03x = 2,126.78 × 911.76
  4. Step 4: Simplify right side
    1,541.03x = 1,939,108.37
  5. Step 5: Solve for x
    x = 1,939,108.37/1,541.03
  6. Step 6: Final answer
    x = 1,258.32

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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.