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Finding the Fourth Proportional to 330,690.70, 456,450.29 and 215,986.88

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Solution

The fourth proportional to 330,690.70, 456,450.29 and 215,986.88 is: 298,125.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,690.70 : 456,450.29 = 215,986.88 : x
  2. Step 2: Convert to fraction form
    330,690.70/456,450.29 = 215,986.88/x
  3. Step 3: Cross multiply
    330,690.70x = 456,450.29 × 215,986.88
  4. Step 4: Simplify right side
    330,690.70x = 98,587,273,599.57
  5. Step 5: Solve for x
    x = 98,587,273,599.57/330,690.70
  6. Step 6: Final answer
    x = 298,125.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.