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Finding the Fourth Proportional to 483,675.38, 725,500.65 and 128,692.40

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Solution

The fourth proportional to 483,675.38, 725,500.65 and 128,692.40 is: 193,035.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,675.38 : 725,500.65 = 128,692.40 : x
  2. Step 2: Convert to fraction form
    483,675.38/725,500.65 = 128,692.40/x
  3. Step 3: Cross multiply
    483,675.38x = 725,500.65 × 128,692.40
  4. Step 4: Simplify right side
    483,675.38x = 93,366,419,850.06
  5. Step 5: Solve for x
    x = 93,366,419,850.06/483,675.38
  6. Step 6: Final answer
    x = 193,035.30

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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.