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Finding the Fourth Proportional to 389,806.07, 537,932.40 and 210,958.07

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Solution

The fourth proportional to 389,806.07, 537,932.40 and 210,958.07 is: 291,122.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,806.07 : 537,932.40 = 210,958.07 : x
  2. Step 2: Convert to fraction form
    389,806.07/537,932.40 = 210,958.07/x
  3. Step 3: Cross multiply
    389,806.07x = 537,932.40 × 210,958.07
  4. Step 4: Simplify right side
    389,806.07x = 113,481,180,894.47
  5. Step 5: Solve for x
    x = 113,481,180,894.47/389,806.07
  6. Step 6: Final answer
    x = 291,122.15

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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.