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Finding the Fourth Proportional to 668,767.80, 1,001,790.90 and 415,270.20

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Solution

The fourth proportional to 668,767.80, 1,001,790.90 and 415,270.20 is: 622,060.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,767.80 : 1,001,790.90 = 415,270.20 : x
  2. Step 2: Convert to fraction form
    668,767.80/1,001,790.90 = 415,270.20/x
  3. Step 3: Cross multiply
    668,767.80x = 1,001,790.90 × 415,270.20
  4. Step 4: Simplify right side
    668,767.80x = 416,013,907,401.18
  5. Step 5: Solve for x
    x = 416,013,907,401.18/668,767.80
  6. Step 6: Final answer
    x = 622,060.31

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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.