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Finding the Fourth Proportional to 320,611.70, 480,903.89 and 83,949.14

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Solution

The fourth proportional to 320,611.70, 480,903.89 and 83,949.14 is: 125,920.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,611.70 : 480,903.89 = 83,949.14 : x
  2. Step 2: Convert to fraction form
    320,611.70/480,903.89 = 83,949.14/x
  3. Step 3: Cross multiply
    320,611.70x = 480,903.89 × 83,949.14
  4. Step 4: Simplify right side
    320,611.70x = 40,371,468,770.67
  5. Step 5: Solve for x
    x = 40,371,468,770.67/320,611.70
  6. Step 6: Final answer
    x = 125,920.13

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1.5x scale

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.