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Finding the Fourth Proportional to 1,540.76, 2,126.04 and 911.48

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Solution

The fourth proportional to 1,540.76, 2,126.04 and 911.48 is: 1,257.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.76 : 2,126.04 = 911.48 : x
  2. Step 2: Convert to fraction form
    1,540.76/2,126.04 = 911.48/x
  3. Step 3: Cross multiply
    1,540.76x = 2,126.04 × 911.48
  4. Step 4: Simplify right side
    1,540.76x = 1,937,842.94
  5. Step 5: Solve for x
    x = 1,937,842.94/1,540.76
  6. Step 6: Final answer
    x = 1,257.72

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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.