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Finding the Fourth Proportional to 325,378.56, 447,667.20 and 286,970.88

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Solution

The fourth proportional to 325,378.56, 447,667.20 and 286,970.88 is: 394,824.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,378.56 : 447,667.20 = 286,970.88 : x
  2. Step 2: Convert to fraction form
    325,378.56/447,667.20 = 286,970.88/x
  3. Step 3: Cross multiply
    325,378.56x = 447,667.20 × 286,970.88
  4. Step 4: Simplify right side
    325,378.56x = 128,467,450,331.14
  5. Step 5: Solve for x
    x = 128,467,450,331.14/325,378.56
  6. Step 6: Final answer
    x = 394,824.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.