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Finding the Fourth Proportional to 397,936.80, 549,162.72 and 216,658.67

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Solution

The fourth proportional to 397,936.80, 549,162.72 and 216,658.67 is: 298,994.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,936.80 : 549,162.72 = 216,658.67 : x
  2. Step 2: Convert to fraction form
    397,936.80/549,162.72 = 216,658.67/x
  3. Step 3: Cross multiply
    397,936.80x = 549,162.72 × 216,658.67
  4. Step 4: Simplify right side
    397,936.80x = 118,980,861,782.97
  5. Step 5: Solve for x
    x = 118,980,861,782.97/397,936.80
  6. Step 6: Final answer
    x = 298,994.37

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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.