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Finding the Fourth Proportional to 389,610.70, 537,657.53 and 217,531.30

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Solution

The fourth proportional to 389,610.70, 537,657.53 and 217,531.30 is: 300,190.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,610.70 : 537,657.53 = 217,531.30 : x
  2. Step 2: Convert to fraction form
    389,610.70/537,657.53 = 217,531.30/x
  3. Step 3: Cross multiply
    389,610.70x = 537,657.53 × 217,531.30
  4. Step 4: Simplify right side
    389,610.70x = 116,957,344,063.52
  5. Step 5: Solve for x
    x = 116,957,344,063.52/389,610.70
  6. Step 6: Final answer
    x = 300,190.28

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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.