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Finding the Fourth Proportional to 664,270.80, 996,406.20 and 427,880.40

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Solution

The fourth proportional to 664,270.80, 996,406.20 and 427,880.40 is: 641,820.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,270.80 : 996,406.20 = 427,880.40 : x
  2. Step 2: Convert to fraction form
    664,270.80/996,406.20 = 427,880.40/x
  3. Step 3: Cross multiply
    664,270.80x = 996,406.20 × 427,880.40
  4. Step 4: Simplify right side
    664,270.80x = 426,342,683,418.48
  5. Step 5: Solve for x
    x = 426,342,683,418.48/664,270.80
  6. Step 6: Final answer
    x = 641,820.60

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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.