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Finding the Fourth Proportional to 397,861.39, 549,055.73 and 216,578.53

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Solution

The fourth proportional to 397,861.39, 549,055.73 and 216,578.53 is: 298,882.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,861.39 : 549,055.73 = 216,578.53 : x
  2. Step 2: Convert to fraction form
    397,861.39/549,055.73 = 216,578.53/x
  3. Step 3: Cross multiply
    397,861.39x = 549,055.73 × 216,578.53
  4. Step 4: Simplify right side
    397,861.39x = 118,913,682,891.48
  5. Step 5: Solve for x
    x = 118,913,682,891.48/397,861.39
  6. Step 6: Final answer
    x = 298,882.19

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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.