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Finding the Fourth Proportional to 660.94, 913.03 and 611.73

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Solution

The fourth proportional to 660.94, 913.03 and 611.73 is: 845.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.94 : 913.03 = 611.73 : x
  2. Step 2: Convert to fraction form
    660.94/913.03 = 611.73/x
  3. Step 3: Cross multiply
    660.94x = 913.03 × 611.73
  4. Step 4: Simplify right side
    660.94x = 558,526.69
  5. Step 5: Solve for x
    x = 558,526.69/660.94
  6. Step 6: Final answer
    x = 845.05

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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.