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Finding the Fourth Proportional to 389,898.84, 583,517.54 and 326,790.20

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Solution

The fourth proportional to 389,898.84, 583,517.54 and 326,790.20 is: 489,069.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,898.84 : 583,517.54 = 326,790.20 : x
  2. Step 2: Convert to fraction form
    389,898.84/583,517.54 = 326,790.20/x
  3. Step 3: Cross multiply
    389,898.84x = 583,517.54 × 326,790.20
  4. Step 4: Simplify right side
    389,898.84x = 190,687,813,600.11
  5. Step 5: Solve for x
    x = 190,687,813,600.11/389,898.84
  6. Step 6: Final answer
    x = 489,069.97

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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.