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Finding the Fourth Proportional to 399,007.20, 597,819.60 and 258,693.60

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Solution

The fourth proportional to 399,007.20, 597,819.60 and 258,693.60 is: 387,592.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,007.20 : 597,819.60 = 258,693.60 : x
  2. Step 2: Convert to fraction form
    399,007.20/597,819.60 = 258,693.60/x
  3. Step 3: Cross multiply
    399,007.20x = 597,819.60 × 258,693.60
  4. Step 4: Simplify right side
    399,007.20x = 154,652,104,474.56
  5. Step 5: Solve for x
    x = 154,652,104,474.56/399,007.20
  6. Step 6: Final answer
    x = 387,592.27

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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.