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Finding the Fourth Proportional to 389,808.59, 537,935.85 and 210,960.59

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Solution

The fourth proportional to 389,808.59, 537,935.85 and 210,960.59 is: 291,125.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,808.59 : 537,935.85 = 210,960.59 : x
  2. Step 2: Convert to fraction form
    389,808.59/537,935.85 = 210,960.59/x
  3. Step 3: Cross multiply
    389,808.59x = 537,935.85 × 210,960.59
  4. Step 4: Simplify right side
    389,808.59x = 113,483,261,608.47
  5. Step 5: Solve for x
    x = 113,483,261,608.47/389,808.59
  6. Step 6: Final answer
    x = 291,125.61

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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.