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Finding the Fourth Proportional to 492,740.60, 739,110.90 and 279,289.40

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Solution

The fourth proportional to 492,740.60, 739,110.90 and 279,289.40 is: 418,934.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,740.60 : 739,110.90 = 279,289.40 : x
  2. Step 2: Convert to fraction form
    492,740.60/739,110.90 = 279,289.40/x
  3. Step 3: Cross multiply
    492,740.60x = 739,110.90 × 279,289.40
  4. Step 4: Simplify right side
    492,740.60x = 206,425,839,794.46
  5. Step 5: Solve for x
    x = 206,425,839,794.46/492,740.60
  6. Step 6: Final answer
    x = 418,934.10

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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.