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Finding the Fourth Proportional to 620,306.50, 855,614.73 and 447,937.42

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Solution

The fourth proportional to 620,306.50, 855,614.73 and 447,937.42 is: 617,858.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,306.50 : 855,614.73 = 447,937.42 : x
  2. Step 2: Convert to fraction form
    620,306.50/855,614.73 = 447,937.42/x
  3. Step 3: Cross multiply
    620,306.50x = 855,614.73 × 447,937.42
  4. Step 4: Simplify right side
    620,306.50x = 383,261,854,670.20
  5. Step 5: Solve for x
    x = 383,261,854,670.20/620,306.50
  6. Step 6: Final answer
    x = 617,858.84

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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.