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Finding the Fourth Proportional to 917,132.20, 1,375,892.70 and 277,383.40

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Solution

The fourth proportional to 917,132.20, 1,375,892.70 and 277,383.40 is: 416,133.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,132.20 : 1,375,892.70 = 277,383.40 : x
  2. Step 2: Convert to fraction form
    917,132.20/1,375,892.70 = 277,383.40/x
  3. Step 3: Cross multiply
    917,132.20x = 1,375,892.70 × 277,383.40
  4. Step 4: Simplify right side
    917,132.20x = 381,649,795,161.18
  5. Step 5: Solve for x
    x = 381,649,795,161.18/917,132.20
  6. Step 6: Final answer
    x = 416,133.90

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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.