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Finding the Fourth Proportional to 925.68, 1,277.10 and 611.10

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Solution

The fourth proportional to 925.68, 1,277.10 and 611.10 is: 843.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.68 : 1,277.10 = 611.10 : x
  2. Step 2: Convert to fraction form
    925.68/1,277.10 = 611.10/x
  3. Step 3: Cross multiply
    925.68x = 1,277.10 × 611.10
  4. Step 4: Simplify right side
    925.68x = 780,435.81
  5. Step 5: Solve for x
    x = 780,435.81/925.68
  6. Step 6: Final answer
    x = 843.09

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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.