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Finding the Fourth Proportional to 260,283.39, 390,425.09 and 82,790.43

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Solution

The fourth proportional to 260,283.39, 390,425.09 and 82,790.43 is: 124,185.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,283.39 : 390,425.09 = 82,790.43 : x
  2. Step 2: Convert to fraction form
    260,283.39/390,425.09 = 82,790.43/x
  3. Step 3: Cross multiply
    260,283.39x = 390,425.09 × 82,790.43
  4. Step 4: Simplify right side
    260,283.39x = 32,323,460,669.94
  5. Step 5: Solve for x
    x = 32,323,460,669.94/260,283.39
  6. Step 6: Final answer
    x = 124,185.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.