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Finding the Fourth Proportional to 666,486, 919,750.68 and 364,680

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Solution

The fourth proportional to 666,486, 919,750.68 and 364,680 is: 503,258.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,486 : 919,750.68 = 364,680 : x
  2. Step 2: Convert to fraction form
    666,486/919,750.68 = 364,680/x
  3. Step 3: Cross multiply
    666,486x = 919,750.68 × 364,680
  4. Step 4: Simplify right side
    666,486x = 335,414,677,982.40
  5. Step 5: Solve for x
    x = 335,414,677,982.40/666,486
  6. Step 6: Final answer
    x = 503,258.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.