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Finding the Fourth Proportional to 322,581.40, 483,434.70 and 215,661.40

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Solution

The fourth proportional to 322,581.40, 483,434.70 and 215,661.40 is: 323,199.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,581.40 : 483,434.70 = 215,661.40 : x
  2. Step 2: Convert to fraction form
    322,581.40/483,434.70 = 215,661.40/x
  3. Step 3: Cross multiply
    322,581.40x = 483,434.70 × 215,661.40
  4. Step 4: Simplify right side
    322,581.40x = 104,258,204,210.58
  5. Step 5: Solve for x
    x = 104,258,204,210.58/322,581.40
  6. Step 6: Final answer
    x = 323,199.68

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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.