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Finding the Fourth Proportional to 691,791.70, 954,631.42 and 401,380.77

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Solution

The fourth proportional to 691,791.70, 954,631.42 and 401,380.77 is: 553,881.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,791.70 : 954,631.42 = 401,380.77 : x
  2. Step 2: Convert to fraction form
    691,791.70/954,631.42 = 401,380.77/x
  3. Step 3: Cross multiply
    691,791.70x = 954,631.42 × 401,380.77
  4. Step 4: Simplify right side
    691,791.70x = 383,170,694,425.79
  5. Step 5: Solve for x
    x = 383,170,694,425.79/691,791.70
  6. Step 6: Final answer
    x = 553,881.60

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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.