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Finding the Fourth Proportional to 405,445.28, 607,857.96 and 245,486.48

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Solution

The fourth proportional to 405,445.28, 607,857.96 and 245,486.48 is: 368,042.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,445.28 : 607,857.96 = 245,486.48 : x
  2. Step 2: Convert to fraction form
    405,445.28/607,857.96 = 245,486.48/x
  3. Step 3: Cross multiply
    405,445.28x = 607,857.96 × 245,486.48
  4. Step 4: Simplify right side
    405,445.28x = 149,220,910,940.38
  5. Step 5: Solve for x
    x = 149,220,910,940.38/405,445.28
  6. Step 6: Final answer
    x = 368,042.05

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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.