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Finding the Fourth Proportional to 389,755.69, 537,864.48 and 210,907.69

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Solution

The fourth proportional to 389,755.69, 537,864.48 and 210,907.69 is: 291,053.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,755.69 : 537,864.48 = 210,907.69 : x
  2. Step 2: Convert to fraction form
    389,755.69/537,864.48 = 210,907.69/x
  3. Step 3: Cross multiply
    389,755.69x = 537,864.48 × 210,907.69
  4. Step 4: Simplify right side
    389,755.69x = 113,439,753,665.19
  5. Step 5: Solve for x
    x = 113,439,753,665.19/389,755.69
  6. Step 6: Final answer
    x = 291,053.49

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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.