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Finding the Fourth Proportional to 405,777.78, 608,721.96 and 169,065

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Solution

The fourth proportional to 405,777.78, 608,721.96 and 169,065 is: 253,620.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,777.78 : 608,721.96 = 169,065 : x
  2. Step 2: Convert to fraction form
    405,777.78/608,721.96 = 169,065/x
  3. Step 3: Cross multiply
    405,777.78x = 608,721.96 × 169,065
  4. Step 4: Simplify right side
    405,777.78x = 102,913,578,167.40
  5. Step 5: Solve for x
    x = 102,913,578,167.40/405,777.78
  6. Step 6: Final answer
    x = 253,620.54

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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.