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Finding the Fourth Proportional to 646.88, 965.22 and 607.69

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Solution

The fourth proportional to 646.88, 965.22 and 607.69 is: 906.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.88 : 965.22 = 607.69 : x
  2. Step 2: Convert to fraction form
    646.88/965.22 = 607.69/x
  3. Step 3: Cross multiply
    646.88x = 965.22 × 607.69
  4. Step 4: Simplify right side
    646.88x = 586,554.54
  5. Step 5: Solve for x
    x = 586,554.54/646.88
  6. Step 6: Final answer
    x = 906.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.