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Finding the Fourth Proportional to 386,079.72, 532,788.49 and 216,313.44

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Solution

The fourth proportional to 386,079.72, 532,788.49 and 216,313.44 is: 298,511.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,079.72 : 532,788.49 = 216,313.44 : x
  2. Step 2: Convert to fraction form
    386,079.72/532,788.49 = 216,313.44/x
  3. Step 3: Cross multiply
    386,079.72x = 532,788.49 × 216,313.44
  4. Step 4: Simplify right side
    386,079.72x = 115,249,308,119.98
  5. Step 5: Solve for x
    x = 115,249,308,119.98/386,079.72
  6. Step 6: Final answer
    x = 298,511.69

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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.