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Finding the Fourth Proportional to 405,737.40, 608,606.10 and 279,766.20

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Solution

The fourth proportional to 405,737.40, 608,606.10 and 279,766.20 is: 419,649.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,737.40 : 608,606.10 = 279,766.20 : x
  2. Step 2: Convert to fraction form
    405,737.40/608,606.10 = 279,766.20/x
  3. Step 3: Cross multiply
    405,737.40x = 608,606.10 × 279,766.20
  4. Step 4: Simplify right side
    405,737.40x = 170,267,415,893.82
  5. Step 5: Solve for x
    x = 170,267,415,893.82/405,737.40
  6. Step 6: Final answer
    x = 419,649.30

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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.