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Finding the Fourth Proportional to 663.34, 914.76 and 611.02

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Solution

The fourth proportional to 663.34, 914.76 and 611.02 is: 842.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.34 : 914.76 = 611.02 : x
  2. Step 2: Convert to fraction form
    663.34/914.76 = 611.02/x
  3. Step 3: Cross multiply
    663.34x = 914.76 × 611.02
  4. Step 4: Simplify right side
    663.34x = 558,936.66
  5. Step 5: Solve for x
    x = 558,936.66/663.34
  6. Step 6: Final answer
    x = 842.61

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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.