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Finding the Fourth Proportional to 389,898.58, 583,517.17 and 326,790

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Solution

The fourth proportional to 389,898.58, 583,517.17 and 326,790 is: 489,069.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,898.58 : 583,517.17 = 326,790 : x
  2. Step 2: Convert to fraction form
    389,898.58/583,517.17 = 326,790/x
  3. Step 3: Cross multiply
    389,898.58x = 583,517.17 × 326,790
  4. Step 4: Simplify right side
    389,898.58x = 190,687,575,984.30
  5. Step 5: Solve for x
    x = 190,687,575,984.30/389,898.58
  6. Step 6: Final answer
    x = 489,069.69

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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.