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Finding the Fourth Proportional to 860,608.39, 1,290,898 and 299,628.31

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Solution

The fourth proportional to 860,608.39, 1,290,898 and 299,628.31 is: 449,437.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,608.39 : 1,290,898 = 299,628.31 : x
  2. Step 2: Convert to fraction form
    860,608.39/1,290,898 = 299,628.31/x
  3. Step 3: Cross multiply
    860,608.39x = 1,290,898 × 299,628.31
  4. Step 4: Simplify right side
    860,608.39x = 386,789,586,122.38
  5. Step 5: Solve for x
    x = 386,789,586,122.38/860,608.39
  6. Step 6: Final answer
    x = 449,437.39

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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.