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Finding the Fourth Proportional to 438,172.70, 656,999.85 and 228,220.70

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Solution

The fourth proportional to 438,172.70, 656,999.85 and 228,220.70 is: 342,196.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,172.70 : 656,999.85 = 228,220.70 : x
  2. Step 2: Convert to fraction form
    438,172.70/656,999.85 = 228,220.70/x
  3. Step 3: Cross multiply
    438,172.70x = 656,999.85 × 228,220.70
  4. Step 4: Simplify right side
    438,172.70x = 149,940,965,666.90
  5. Step 5: Solve for x
    x = 149,940,965,666.90/438,172.70
  6. Step 6: Final answer
    x = 342,196.05

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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.