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Finding the Fourth Proportional to 664,114.80, 996,172.20 and 427,724.40

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Solution

The fourth proportional to 664,114.80, 996,172.20 and 427,724.40 is: 641,586.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,114.80 : 996,172.20 = 427,724.40 : x
  2. Step 2: Convert to fraction form
    664,114.80/996,172.20 = 427,724.40/x
  3. Step 3: Cross multiply
    664,114.80x = 996,172.20 × 427,724.40
  4. Step 4: Simplify right side
    664,114.80x = 426,087,156,541.68
  5. Step 5: Solve for x
    x = 426,087,156,541.68/664,114.80
  6. Step 6: Final answer
    x = 641,586.60

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Double scale
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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.