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Finding the Fourth Proportional to 389,839.32, 537,978.17 and 220,073.45

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Solution

The fourth proportional to 389,839.32, 537,978.17 and 220,073.45 is: 303,701.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,839.32 : 537,978.17 = 220,073.45 : x
  2. Step 2: Convert to fraction form
    389,839.32/537,978.17 = 220,073.45/x
  3. Step 3: Cross multiply
    389,839.32x = 537,978.17 × 220,073.45
  4. Step 4: Simplify right side
    389,839.32x = 118,394,709,756.88
  5. Step 5: Solve for x
    x = 118,394,709,756.88/389,839.32
  6. Step 6: Final answer
    x = 303,701.30

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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.