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Finding the Fourth Proportional to 492,739.60, 739,109.40 and 279,288.40

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Solution

The fourth proportional to 492,739.60, 739,109.40 and 279,288.40 is: 418,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,739.60 : 739,109.40 = 279,288.40 : x
  2. Step 2: Convert to fraction form
    492,739.60/739,109.40 = 279,288.40/x
  3. Step 3: Cross multiply
    492,739.60x = 739,109.40 × 279,288.40
  4. Step 4: Simplify right side
    492,739.60x = 206,424,681,750.96
  5. Step 5: Solve for x
    x = 206,424,681,750.96/492,739.60
  6. Step 6: Final answer
    x = 418,932.60

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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.