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Finding the Fourth Proportional to 612,076.92, 918,416.70 and 275,355.60

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Solution

The fourth proportional to 612,076.92, 918,416.70 and 275,355.60 is: 413,168.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,076.92 : 918,416.70 = 275,355.60 : x
  2. Step 2: Convert to fraction form
    612,076.92/918,416.70 = 275,355.60/x
  3. Step 3: Cross multiply
    612,076.92x = 918,416.70 × 275,355.60
  4. Step 4: Simplify right side
    612,076.92x = 252,891,181,478.52
  5. Step 5: Solve for x
    x = 252,891,181,478.52/612,076.92
  6. Step 6: Final answer
    x = 413,168.96

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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.