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Finding the Fourth Proportional to 430,079.20, 644,900.10 and 252,640.60

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Solution

The fourth proportional to 430,079.20, 644,900.10 and 252,640.60 is: 378,832.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,079.20 : 644,900.10 = 252,640.60 : x
  2. Step 2: Convert to fraction form
    430,079.20/644,900.10 = 252,640.60/x
  3. Step 3: Cross multiply
    430,079.20x = 644,900.10 × 252,640.60
  4. Step 4: Simplify right side
    430,079.20x = 162,927,948,204.06
  5. Step 5: Solve for x
    x = 162,927,948,204.06/430,079.20
  6. Step 6: Final answer
    x = 378,832.43

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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.