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Finding the Fourth Proportional to 318,581.83, 477,604.91 and 213,078.79

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Solution

The fourth proportional to 318,581.83, 477,604.91 and 213,078.79 is: 319,439.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,581.83 : 477,604.91 = 213,078.79 : x
  2. Step 2: Convert to fraction form
    318,581.83/477,604.91 = 213,078.79/x
  3. Step 3: Cross multiply
    318,581.83x = 477,604.91 × 213,078.79
  4. Step 4: Simplify right side
    318,581.83x = 101,767,475,255.47
  5. Step 5: Solve for x
    x = 101,767,475,255.47/318,581.83
  6. Step 6: Final answer
    x = 319,439.04

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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.