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Finding the Fourth Proportional to 690,539.68, 952,922.64 and 388,692.64

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Solution

The fourth proportional to 690,539.68, 952,922.64 and 388,692.64 is: 536,383.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,539.68 : 952,922.64 = 388,692.64 : x
  2. Step 2: Convert to fraction form
    690,539.68/952,922.64 = 388,692.64/x
  3. Step 3: Cross multiply
    690,539.68x = 952,922.64 × 388,692.64
  4. Step 4: Simplify right side
    690,539.68x = 370,394,016,657.37
  5. Step 5: Solve for x
    x = 370,394,016,657.37/690,539.68
  6. Step 6: Final answer
    x = 536,383.39

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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.