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Finding the Fourth Proportional to 389,810.88, 537,939.02 and 210,962.88

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Solution

The fourth proportional to 389,810.88, 537,939.02 and 210,962.88 is: 291,128.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,810.88 : 537,939.02 = 210,962.88 : x
  2. Step 2: Convert to fraction form
    389,810.88/537,939.02 = 210,962.88/x
  3. Step 3: Cross multiply
    389,810.88x = 537,939.02 × 210,962.88
  4. Step 4: Simplify right side
    389,810.88x = 113,485,164,923.58
  5. Step 5: Solve for x
    x = 113,485,164,923.58/389,810.88
  6. Step 6: Final answer
    x = 291,128.78

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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.