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Finding the Fourth Proportional to 925.36, 1,276.87 and 611.23

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Solution

The fourth proportional to 925.36, 1,276.87 and 611.23 is: 843.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.36 : 1,276.87 = 611.23 : x
  2. Step 2: Convert to fraction form
    925.36/1,276.87 = 611.23/x
  3. Step 3: Cross multiply
    925.36x = 1,276.87 × 611.23
  4. Step 4: Simplify right side
    925.36x = 780,461.25
  5. Step 5: Solve for x
    x = 780,461.25/925.36
  6. Step 6: Final answer
    x = 843.41

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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.