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Finding the Fourth Proportional to 217,288.20, 325,932.30 and 188,128.20

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Solution

The fourth proportional to 217,288.20, 325,932.30 and 188,128.20 is: 282,192.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,288.20 : 325,932.30 = 188,128.20 : x
  2. Step 2: Convert to fraction form
    217,288.20/325,932.30 = 188,128.20/x
  3. Step 3: Cross multiply
    217,288.20x = 325,932.30 × 188,128.20
  4. Step 4: Simplify right side
    217,288.20x = 61,317,056,920.86
  5. Step 5: Solve for x
    x = 61,317,056,920.86/217,288.20
  6. Step 6: Final answer
    x = 282,192.30

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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.