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Finding the Fourth Proportional to 492,087.90, 738,131.85 and 487,940.70

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Solution

The fourth proportional to 492,087.90, 738,131.85 and 487,940.70 is: 731,911.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,087.90 : 738,131.85 = 487,940.70 : x
  2. Step 2: Convert to fraction form
    492,087.90/738,131.85 = 487,940.70/x
  3. Step 3: Cross multiply
    492,087.90x = 738,131.85 × 487,940.70
  4. Step 4: Simplify right side
    492,087.90x = 360,164,571,581.30
  5. Step 5: Solve for x
    x = 360,164,571,581.30/492,087.90
  6. Step 6: Final answer
    x = 731,911.05

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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.