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Finding the Fourth Proportional to 548,431.56, 756,847.80 and 387,570.42

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Solution

The fourth proportional to 548,431.56, 756,847.80 and 387,570.42 is: 534,855.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,431.56 : 756,847.80 = 387,570.42 : x
  2. Step 2: Convert to fraction form
    548,431.56/756,847.80 = 387,570.42/x
  3. Step 3: Cross multiply
    548,431.56x = 756,847.80 × 387,570.42
  4. Step 4: Simplify right side
    548,431.56x = 293,331,819,722.08
  5. Step 5: Solve for x
    x = 293,331,819,722.08/548,431.56
  6. Step 6: Final answer
    x = 534,855.83

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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.