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Finding the Fourth Proportional to 217,915.56, 326,894.58 and 84,806.64

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Solution

The fourth proportional to 217,915.56, 326,894.58 and 84,806.64 is: 127,218.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,915.56 : 326,894.58 = 84,806.64 : x
  2. Step 2: Convert to fraction form
    217,915.56/326,894.58 = 84,806.64/x
  3. Step 3: Cross multiply
    217,915.56x = 326,894.58 × 84,806.64
  4. Step 4: Simplify right side
    217,915.56x = 27,722,830,964.01
  5. Step 5: Solve for x
    x = 27,722,830,964.01/217,915.56
  6. Step 6: Final answer
    x = 127,218.23

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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.