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Finding the Fourth Proportional to 424,665.60, 636,998.40 and 171,945.60

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Solution

The fourth proportional to 424,665.60, 636,998.40 and 171,945.60 is: 257,918.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,665.60 : 636,998.40 = 171,945.60 : x
  2. Step 2: Convert to fraction form
    424,665.60/636,998.40 = 171,945.60/x
  3. Step 3: Cross multiply
    424,665.60x = 636,998.40 × 171,945.60
  4. Step 4: Simplify right side
    424,665.60x = 109,529,072,087.04
  5. Step 5: Solve for x
    x = 109,529,072,087.04/424,665.60
  6. Step 6: Final answer
    x = 257,918.40

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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.