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Finding the Fourth Proportional to 389,486.52, 537,496.62 and 219,720.12

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Solution

The fourth proportional to 389,486.52, 537,496.62 and 219,720.12 is: 303,216.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,486.52 : 537,496.62 = 219,720.12 : x
  2. Step 2: Convert to fraction form
    389,486.52/537,496.62 = 219,720.12/x
  3. Step 3: Cross multiply
    389,486.52x = 537,496.62 × 219,720.12
  4. Step 4: Simplify right side
    389,486.52x = 118,098,821,845.99
  5. Step 5: Solve for x
    x = 118,098,821,845.99/389,486.52
  6. Step 6: Final answer
    x = 303,216.71

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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.