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Finding the Fourth Proportional to 389,703.78, 537,780.33 and 219,953.70

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Solution

The fourth proportional to 389,703.78, 537,780.33 and 219,953.70 is: 303,529.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,703.78 : 537,780.33 = 219,953.70 : x
  2. Step 2: Convert to fraction form
    389,703.78/537,780.33 = 219,953.70/x
  3. Step 3: Cross multiply
    389,703.78x = 537,780.33 × 219,953.70
  4. Step 4: Simplify right side
    389,703.78x = 118,286,773,370.72
  5. Step 5: Solve for x
    x = 118,286,773,370.72/389,703.78
  6. Step 6: Final answer
    x = 303,529.96

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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.