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Finding the Fourth Proportional to 643,745.20, 965,617.80 and 269,729.20

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Solution

The fourth proportional to 643,745.20, 965,617.80 and 269,729.20 is: 404,593.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,745.20 : 965,617.80 = 269,729.20 : x
  2. Step 2: Convert to fraction form
    643,745.20/965,617.80 = 269,729.20/x
  3. Step 3: Cross multiply
    643,745.20x = 965,617.80 × 269,729.20
  4. Step 4: Simplify right side
    643,745.20x = 260,455,316,699.76
  5. Step 5: Solve for x
    x = 260,455,316,699.76/643,745.20
  6. Step 6: Final answer
    x = 404,593.80

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1.5x scale

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.