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Finding the Fourth Proportional to 388,766.28, 536,677.60 and 274,138.32

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Solution

The fourth proportional to 388,766.28, 536,677.60 and 274,138.32 is: 378,437.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,766.28 : 536,677.60 = 274,138.32 : x
  2. Step 2: Convert to fraction form
    388,766.28/536,677.60 = 274,138.32/x
  3. Step 3: Cross multiply
    388,766.28x = 536,677.60 × 274,138.32
  4. Step 4: Simplify right side
    388,766.28x = 147,123,895,645.63
  5. Step 5: Solve for x
    x = 147,123,895,645.63/388,766.28
  6. Step 6: Final answer
    x = 378,437.90

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1.5x scale

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.