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Finding the Fourth Proportional to 389,604.04, 537,661.96 and 215,173.78

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Solution

The fourth proportional to 389,604.04, 537,661.96 and 215,173.78 is: 296,944.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,604.04 : 537,661.96 = 215,173.78 : x
  2. Step 2: Convert to fraction form
    389,604.04/537,661.96 = 215,173.78/x
  3. Step 3: Cross multiply
    389,604.04x = 537,661.96 × 215,173.78
  4. Step 4: Simplify right side
    389,604.04x = 115,690,756,295.41
  5. Step 5: Solve for x
    x = 115,690,756,295.41/389,604.04
  6. Step 6: Final answer
    x = 296,944.45

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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.