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Finding the Fourth Proportional to 217,900.80, 326,967.30 and 84,785.40

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Solution

The fourth proportional to 217,900.80, 326,967.30 and 84,785.40 is: 127,223.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,900.80 : 326,967.30 = 84,785.40 : x
  2. Step 2: Convert to fraction form
    217,900.80/326,967.30 = 84,785.40/x
  3. Step 3: Cross multiply
    217,900.80x = 326,967.30 × 84,785.40
  4. Step 4: Simplify right side
    217,900.80x = 27,722,053,317.42
  5. Step 5: Solve for x
    x = 27,722,053,317.42/217,900.80
  6. Step 6: Final answer
    x = 127,223.27

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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.