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Finding the Fourth Proportional to 389,490.98, 537,522.63 and 219,721.46

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Solution

The fourth proportional to 389,490.98, 537,522.63 and 219,721.46 is: 303,229.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,490.98 : 537,522.63 = 219,721.46 : x
  2. Step 2: Convert to fraction form
    389,490.98/537,522.63 = 219,721.46/x
  3. Step 3: Cross multiply
    389,490.98x = 537,522.63 × 219,721.46
  4. Step 4: Simplify right side
    389,490.98x = 118,105,257,046.64
  5. Step 5: Solve for x
    x = 118,105,257,046.64/389,490.98
  6. Step 6: Final answer
    x = 303,229.76

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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.