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Finding the Fourth Proportional to 485,272.50, 669,683.34 and 281,338.80

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Solution

The fourth proportional to 485,272.50, 669,683.34 and 281,338.80 is: 388,251.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,272.50 : 669,683.34 = 281,338.80 : x
  2. Step 2: Convert to fraction form
    485,272.50/669,683.34 = 281,338.80/x
  3. Step 3: Cross multiply
    485,272.50x = 669,683.34 × 281,338.80
  4. Step 4: Simplify right side
    485,272.50x = 188,407,907,255.59
  5. Step 5: Solve for x
    x = 188,407,907,255.59/485,272.50
  6. Step 6: Final answer
    x = 388,251.77

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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.