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Finding the Fourth Proportional to 638,217.36, 880,722.60 and 351,737.34

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Solution

The fourth proportional to 638,217.36, 880,722.60 and 351,737.34 is: 485,387.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,217.36 : 880,722.60 = 351,737.34 : x
  2. Step 2: Convert to fraction form
    638,217.36/880,722.60 = 351,737.34/x
  3. Step 3: Cross multiply
    638,217.36x = 880,722.60 × 351,737.34
  4. Step 4: Simplify right side
    638,217.36x = 309,783,024,601.88
  5. Step 5: Solve for x
    x = 309,783,024,601.88/638,217.36
  6. Step 6: Final answer
    x = 485,387.96

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Double scale
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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.