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Finding the Fourth Proportional to 381,263.97, 571,496.88 and 128,457.12

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Solution

The fourth proportional to 381,263.97, 571,496.88 and 128,457.12 is: 192,551.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,263.97 : 571,496.88 = 128,457.12 : x
  2. Step 2: Convert to fraction form
    381,263.97/571,496.88 = 128,457.12/x
  3. Step 3: Cross multiply
    381,263.97x = 571,496.88 × 128,457.12
  4. Step 4: Simplify right side
    381,263.97x = 73,412,843,293.79
  5. Step 5: Solve for x
    x = 73,412,843,293.79/381,263.97
  6. Step 6: Final answer
    x = 192,551.22

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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.