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Finding the Fourth Proportional to 325,862.70, 489,231.45 and 208,056.30

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Solution

The fourth proportional to 325,862.70, 489,231.45 and 208,056.30 is: 312,363.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,862.70 : 489,231.45 = 208,056.30 : x
  2. Step 2: Convert to fraction form
    325,862.70/489,231.45 = 208,056.30/x
  3. Step 3: Cross multiply
    325,862.70x = 489,231.45 × 208,056.30
  4. Step 4: Simplify right side
    325,862.70x = 101,787,685,330.64
  5. Step 5: Solve for x
    x = 101,787,685,330.64/325,862.70
  6. Step 6: Final answer
    x = 312,363.72

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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.