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Finding the Fourth Proportional to 393,640.80, 589,856.40 and 293,330.40

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Solution

The fourth proportional to 393,640.80, 589,856.40 and 293,330.40 is: 439,544.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,640.80 : 589,856.40 = 293,330.40 : x
  2. Step 2: Convert to fraction form
    393,640.80/589,856.40 = 293,330.40/x
  3. Step 3: Cross multiply
    393,640.80x = 589,856.40 × 293,330.40
  4. Step 4: Simplify right side
    393,640.80x = 173,022,813,754.56
  5. Step 5: Solve for x
    x = 173,022,813,754.56/393,640.80
  6. Step 6: Final answer
    x = 439,544.92

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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.