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Finding the Fourth Proportional to 643,969.40, 965,910.90 and 170,644.60

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Solution

The fourth proportional to 643,969.40, 965,910.90 and 170,644.60 is: 255,955.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,969.40 : 965,910.90 = 170,644.60 : x
  2. Step 2: Convert to fraction form
    643,969.40/965,910.90 = 170,644.60/x
  3. Step 3: Cross multiply
    643,969.40x = 965,910.90 × 170,644.60
  4. Step 4: Simplify right side
    643,969.40x = 164,827,479,166.14
  5. Step 5: Solve for x
    x = 164,827,479,166.14/643,969.40
  6. Step 6: Final answer
    x = 255,955.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.