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Finding the Fourth Proportional to 638,149.40, 880,634.78 and 347,763.50

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Solution

The fourth proportional to 638,149.40, 880,634.78 and 347,763.50 is: 479,907.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,149.40 : 880,634.78 = 347,763.50 : x
  2. Step 2: Convert to fraction form
    638,149.40/880,634.78 = 347,763.50/x
  3. Step 3: Cross multiply
    638,149.40x = 880,634.78 × 347,763.50
  4. Step 4: Simplify right side
    638,149.40x = 306,252,627,172.54
  5. Step 5: Solve for x
    x = 306,252,627,172.54/638,149.40
  6. Step 6: Final answer
    x = 479,907.42

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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.