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Finding the Fourth Proportional to 1,202,420, 1,659,391.76 and 665,876

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Solution

The fourth proportional to 1,202,420, 1,659,391.76 and 665,876 is: 918,937.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202,420 : 1,659,391.76 = 665,876 : x
  2. Step 2: Convert to fraction form
    1,202,420/1,659,391.76 = 665,876/x
  3. Step 3: Cross multiply
    1,202,420x = 1,659,391.76 × 665,876
  4. Step 4: Simplify right side
    1,202,420x = 1,104,949,147,581.76
  5. Step 5: Solve for x
    x = 1,104,949,147,581.76/1,202,420
  6. Step 6: Final answer
    x = 918,937.77

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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.