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Finding the Fourth Proportional to 787,079.72, 1,086,165 and 447,548

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Solution

The fourth proportional to 787,079.72, 1,086,165 and 447,548 is: 617,613.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,079.72 : 1,086,165 = 447,548 : x
  2. Step 2: Convert to fraction form
    787,079.72/1,086,165 = 447,548/x
  3. Step 3: Cross multiply
    787,079.72x = 1,086,165 × 447,548
  4. Step 4: Simplify right side
    787,079.72x = 486,110,973,420
  5. Step 5: Solve for x
    x = 486,110,973,420/787,079.72
  6. Step 6: Final answer
    x = 617,613.39

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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.