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Finding the Fourth Proportional to 389,685.88, 537,708.86 and 236,644.48

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Solution

The fourth proportional to 389,685.88, 537,708.86 and 236,644.48 is: 326,534.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,685.88 : 537,708.86 = 236,644.48 : x
  2. Step 2: Convert to fraction form
    389,685.88/537,708.86 = 236,644.48/x
  3. Step 3: Cross multiply
    389,685.88x = 537,708.86 × 236,644.48
  4. Step 4: Simplify right side
    389,685.88x = 127,245,832,382.87
  5. Step 5: Solve for x
    x = 127,245,832,382.87/389,685.88
  6. Step 6: Final answer
    x = 326,534.37

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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.