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Finding the Fourth Proportional to 620,147.80, 930,221.70 and 480,179.80

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Solution

The fourth proportional to 620,147.80, 930,221.70 and 480,179.80 is: 720,269.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,147.80 : 930,221.70 = 480,179.80 : x
  2. Step 2: Convert to fraction form
    620,147.80/930,221.70 = 480,179.80/x
  3. Step 3: Cross multiply
    620,147.80x = 930,221.70 × 480,179.80
  4. Step 4: Simplify right side
    620,147.80x = 446,673,669,861.66
  5. Step 5: Solve for x
    x = 446,673,669,861.66/620,147.80
  6. Step 6: Final answer
    x = 720,269.70

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Similar ratio
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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.