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Finding the Fourth Proportional to 217,389, 325,265.94 and 128,684.28

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Solution

The fourth proportional to 217,389, 325,265.94 and 128,684.28 is: 192,542.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,389 : 325,265.94 = 128,684.28 : x
  2. Step 2: Convert to fraction form
    217,389/325,265.94 = 128,684.28/x
  3. Step 3: Cross multiply
    217,389x = 325,265.94 × 128,684.28
  4. Step 4: Simplify right side
    217,389x = 41,856,613,297.42
  5. Step 5: Solve for x
    x = 41,856,613,297.42/217,389
  6. Step 6: Final answer
    x = 192,542.46

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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.